Fix For Mercedes Key FOB Not Working

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Mercedes-Benz key fob not working? You need change the keyless remote battery. Is your Mercedes key fob not working after a battery change? This video will help you troubleshoot problems where the Mercedes key fob doesn’t work or no longer unlock/locks doors or trunk. In most cases, the key can start the car but not work as a keyless entry remote. Usually when Mercedes key fob is not working, it’s because either because the key is defective or the All Activity Module (AAM) is not recognizing the key signal, or it is not receiving signal due to an antenna issue.
Mercedes key fob not working after battery change
Mercedes remote doesn’t work anymore
Keyless remote doesn’t lock/unlock the car
Mercedes key fob won’t unlock doors
Panic button doesn’t work
Trunk unlock doesn’t work

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Опубликовано:

17 сен 2017

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Комментарии : 321

@nadeemm4202 2 года назад

All I want to say is THANK YOU. This video saved me perhaps few hundred $ as I was never able to get a straight answer from either the dealer or any other local automotive locksmiths (the dealer wanted me to buy a new key). So one pair of my 2008 ML320 CDI key had stopped working (will not unlock nor will start the car) about 3 years back and since this is mostly a in-town car, I kept using the other working pair, until today. I followed the steps outlined in the video and found out that the 'broken' key had both the LED and the infrared sensor operational and they worked exactly as shown here. Next all I did was put the key in the ignition and within few seconds the car display showed "Key check-in in progress, please wait" message (Btw I didn't press both lock + unlock buttons prior to inserting the key in the ignition). Within seconds my 'inoperable' key came to life and now once again I have a working pair. Btw, I didn't have to change any fuse as one key was always operational. Thank you again and keep these great videos coming. God bless

@notwhereyouthink 2 года назад

The hold down for 10 seconds thingy worked a treat. Thank you so much for uploading this tip. Invaluable.

@RXTSEA1 Год назад

Thanks a million!! My FOB for my 2005 SL 55 AMG wasn't working and I thought I had to go to the dealer and pay whatever they were going to charge to correct it. Luckily, I watched your video! I put the FOB in the ignition for a few seconds, took it out, then pressed and held the Unlock and Lock buttons together for 10 sec then pressed the Lock button 5 times and it worked! Much appreciated.

@stephenrowlands843 2 года назад

Thanks for the info. The infra red trick with the camera has saved me checking the rest of the car for my unlock issue. I now know that it is my key fob that has a fault. Brilliant.

@GGriffith Год назад

Thank you - this was extremely helpful! I didn't realize you could check the Infrared signal using your phone camera either - that is an extremely useful trick for all IR remotes!!!

@HighMakaMaka 2 года назад

4 years later and you're still saving our butts! Thank you for the video. The recalibration was perfect. Put the FOB in the ignition for a few seconds, then press and hold the Unlock and Lock button for 10 sec then press (in my case a 2000 E320) the Lock button 5 times and it worked! The flashers flashed a few times and it was recalibrated. One little thing, when I opened the door with the key, the alarm went off. I put the FOB in the ignition and it went off. Thanks again!!!

@jasmineshabrell3878 2 года назад

Each ? 10 seconds each?

@19211265 Год назад

@@jasmineshabrell3878 together /simultaneously for 10 seconds 👍🏻

@newjerusalem4516 Год назад

Omg I kept the key in the ignition and held down the lock button and it worked! 🤦🏽‍♀️ omg thank you 😊

@tyfricable 4 года назад

Great video! You just saved me a very expensive trip to the dealership!

@Triumphandme Год назад

Thanks buddy from the UK, the spare remote works perfectly now!

@newellweldy9944 2 года назад

this is the perfect fix for me, i swapped the computer battery in my 2007 s550 and didnt know i had to resync my keys, thanks for the help. wish i knew this before i spent money on new key batteries.

@dericyu2700 8 месяцев назад

Hello Mr.iRepair! Thank you so much for this simple straight forward information! Trying to figure out how to fix the lock system on my Dad's ML350! and it worked!

@lisaslegacy2424 2 года назад

I am new to dealing with Mercedes-Benz thought that all was lost this morning until I saw this video thanks so much

@Nbabafinest 5 лет назад

Thank you so much for this video!!! Dropped my key in a little bit of water. Took the key apart and let it sit in white rice for hours.My car wouldn’t start but the doors unlocked. I watched this video and found out It was just a fuse!! Save me hundreds of dollars!!! Thank you! I just subscribed!!

@iRepairAutos 5 лет назад

Glad you were able to solve your issue! Thanks for the kind words.

@danielsandoval9610 2 года назад

What fuse ?

@renee9113 Год назад

Thank you, thank you, thank you 😊 I feel so knowledgeable now about my car ❤ I know now why my doors wouldn’t lock, dead batteries, no red light no infrared. You saved me money 👍 I thought I had to buy replacement keys.

@EricK-kj4fn Год назад

you dodged a bullet! i am in the same predicament now! now red light no infared! key works to start car but not to lock doors /unlock after installing new 2025 batteries

@richdemonspawn 10 месяцев назад

Thanks for the video, Sir. Really clear. The re-synch tip worked for me. Live and learn ... Cheers from Nottingham, England.

@janicesalinas8045 4 года назад

Wow! Thanks! My fob has been inoperable for 2 years. Changed the battery initially and that did nothing. I modified your instructions a bit. I actually started the engine with the inoperable fob rather than just putting the key in the ignition. I turned the car off and held the open and close buttons down on the fob simultaneously for 10 seconds. When I released, the car made 2 clicking sounds and the fob is now working.

@iRepairAutos 4 года назад

That's awesome. Buy me a beer when you see me! 😎

@emilioleon7505 2 года назад

Hi friend. The FOB was working with IR before? (Open pointing at the door) Thanks.

@bradellis6223 Год назад

Ty sir

@barjunkies1 Год назад

Change my batt as well car still not unlocking but wen I get out it unlocks

@nicholmoore4899 4 года назад

This was so helpful thank you!!! I have a 98 c230 and this is what's happening

@ramoncordero6158 4 года назад

Thank you!! This saved me some towing money. Lint at the bottom of the FOB blocking the infrared.

@ttommyschannel1149 5 лет назад

Hello my friend. I just wanted to thank you for sharing your knowledge. My issue seems to be with the infrared signal. Would have never thought to check that. Many thanks again. Tom

@anwarvarghese5730 3 года назад

How did you fix that ?

@jeremyfoster1064 2 года назад

@@anwarvarghese5730 did you find out ? Was it replacing the fuse he was talking about in the video ?

@EricK-kj4fn Год назад

@@anwarvarghese5730 so what happened did we get an answer boyz??!! im in the same boat how we going to fix this damn infared problem! man! niiu im broke!! 😂

@daniellucatero-jimenez.1440 2 года назад

Holding the lock & unlock button fixed it for me thank you!

@kamaladekunle2119 2 года назад

Thanks for the hints...it really worked magic.

@maxximum18 3 года назад

good video man needed that info

@deonmoodley1125 Год назад

Hello Keith my name is Deon from SOUTH AFRICA I just bought a 2002 w203 C270CDI I enjoyed watching your videos I have subscribed .

@xxcandlessxx 2 года назад

Thanks man this worked. Great advise :)

@lotusprins Год назад

Thank you for sharing!! Will try and hope it works.

@alekfromupwork7646 3 года назад

Helped me with my 2009 B class, but the fuses are not in the back. Couldn't find the fuse, but fixed my key and later linked it with the car. Saved me 200 bucks

@raymondmiller4913 3 месяца назад

Thank you for this...a little update. If you try the "both button hold down & 5 press on the unlock " it will reprogrammed the key..BUT...you have to put the key into the ignition and the dash will say " re-calculating" The dash will return to normal after completing and its all good from then on

@jaredgauthia9834 4 года назад

great info bro

@matteroffact6997 2 года назад

Really Informative!!!!!

@kencassell4055 4 года назад

Thank you you video helped us with the same issue and it works great now

@davidgervais3893 2 года назад

Thanks for the video. Great. I have a 2016 Gle 400 and the display comes up with fob not found. Battery is good but can’t see the infrared. The second key works fine. Did you thinks it’s the fob itself? Many thanks

@TheInternationalEnglishExpert 3 года назад

Thanks the holding down for 10 seconds worked.

@jamestaylor9329 2 года назад

Thanks for video. I discovered metal pick works great for clip. Camera trick, thanks too!

@leanidis300 4 года назад

I had the same issue yesterday but, today I was able to open my 05' SL500 with the manual key. Usually I hear the ring of the door being open but, I not this time, the dash was blank but was able to start the car and drive around the block. When I parked the car it was able to lock with the remote? any suggestions are appreciated.

@ramban3488 4 года назад

I have the same issue , do you know which fuse is for w204 250 cdi model 2007? Thank you for your informative videos

@angelinaanderson481 Год назад

Wow 🤩 u r my Hero!! My Merc dealer in Anchorage wanted $1100.00 (totally outrageous) ridiculous! I can’t believe it worked and my husband thinks I’m a genius!!

@iRepairAutos Год назад

Glad this worked for you!

@lordhighoctane3987 2 года назад

Hello I just bought myself a 2005 CLK 500 and I've been having an issue where my key sometimes will not turn so I'm in the process of cleaning the fob itself could this possibly cause the main electrical to turn off while driving and this includes the instrument cluster environment control and radio everything quits but my windows. Also oddly enough the car continues to run I have power brakes power steering and the windows of course that's it thank you.

@MrPixelstick Год назад

Totally worked on a Mercedes Sprinter - thanks :)

@fabricioemmanuelli1115 2 года назад

Thanks for this

@Aldo30362 5 лет назад

Thank's bro. Whit your advises i repair my radiofrecuency antena(long distance). God bless you folk!!!

@akinfolarinibukun8062 5 лет назад

Pls bro hw do you repair your long distance radiofrequency antenna? Pls help out.

@akinfolarinibukun8062 5 лет назад

When I move closer to the car it locks and unlocks, but at the range of 4 to 6 feet back, it would never work

@red2965 4 года назад

@@akinfolarinibukun8062 check yo battery mon they get weak and shorten ya range

@angumonju5913 3 года назад

I have changed my battery but the long distance lock and unlock gestures still do not work. Grateful for any solution

@anitahubbard8558 5 лет назад

I have a 2001 E320 and neither keybob is working to lock or unlock the doors or open the trunk. They do, however, turn on the alarm. I tried the recalibration method you mentioned and they still don’t work. I have 3 fuse boxes, which are not labeled so I don’t know which one is for the antenna and my Manuel doesn’t say which fuse is goes where. Any suggestions, please?

@Beauty55505 3 года назад

Thanks for the information, but what fuse number if a 1999 e320 Mercedes Benz????

@adrianlunnon3514 5 лет назад

Fantastic video really has helped me with my c class.

@N.E.ACMG47 7 месяцев назад

Many thanks

@user-cw6ld9oj9i 2 года назад

The only thing the batteries work is the lock/unlock/truck release. Anyway. What starts the car is when you insert your fob in the slot to start it you hear the steering wheel unlock. What that is is the EIS. It is magnetized and inside your fob at the end on the circuit board near the infrared light on one side is a copper coil which gets energized and that makes the 2 infrared boxes light up (you see it as one light on the outside via the camera as you showed) and sends info to the car verifying it’s the correct key and it unlocks the steering wheel allowing you to start you car. Part of Mercedes anti thief feature. Now my car won’t start because this copper coil is broken off on one end. I’m in process of repairing it. I’m just waiting on my solder kit to arrive via Amazon. And I’ll reattach it and hopefully it will work. Or else I have to get a new coil they sell on eBay

@satyaaarose 7 месяцев назад

This is a great troubleshooting vid. Question is, if any of the early steps is true, how to proceed? In my case the buttons work only intermittently, so there is sometimes, but mostly not, an LED and an IR. Can the buttons themselves be repaired? I just bought this 2003 E320, it looks like the (only) fob was run over 😢

@colindebose3123 2 года назад

Thank you so much for this video! The recalibration just saved me time, and money, that would’ve otherwise been wasted at a dealership.

@sandrapeterson2833 4 года назад

I have a 2015 ML350 with this same issue... can you please tell me where and which fuse? I have searched high and low and many things have changed with the fuse boxes. THanks!

@teemac2887 4 года назад

Hello I followed your video trying to unlock my Mercedes mL 350. The lights on both of my key fobs but still not able to unlock. So I tried opening the door manually and the lock will not come up after a few pulls. Any suggestions..

@dannynim414 2 года назад

Great video ! my FOB does not transmit Infer Red light even I cleaned inside the FOB. Is my FOB is bad?

@oceannaslays5806 4 года назад

Whew thank you🙏🏽🙏🏽🙏🏽

@ethanruiz7866 7 месяцев назад

🙌 IT WORKED!

@kgbroadus 7 месяцев назад

10:45pm est. Good evening Sir. First let me say thank you for the videos you put out, you’ve helped me with multiple issues over the last couple years. I’m just wondering if you’ve worked on this issue with a laster model ML 315 as my 2015. I’m having the same issue and I’ve tried everything in this video.(except having the module scanned) Also there’s not a fuse box in the rear anymore. I’ve checked the other three fuse boxes, but not sure which fuse it would be in those. Besides scanning the module is there anything else you can suggest? Thank you in advance for any help you might provide! God bless!

@jl6567 5 месяцев назад

Hello, hopefully you’ll be able to help me and respond ,also thank you much for putting out the videos, I have a SLK320 2004, I’ve recently bought the car, there are a few bugs that I am trying to get out. One of them is the key fob, I have replaced the batteries and they are positioned properly. The lights work on it, I’ve checked the fuses in the areas of the engine compartment, the left/Right sides, also next to the steering wheel, there was a diagram that said there were fuses on the passenger side right next to the globe Department did not find that, did not find any fuses in the trunk, if I saw correctly, the antenna for the fob is in the trunk did not look at that yetif all of the wires are connected to it, what else should I look at?

@petrvolf5550 3 месяца назад

you are best🎉🎉🎉

@ThEDIPPA1 Год назад

Hey friend, I have a 02 cl55. Do you know where this antenna fuse is located on the cl? I haven’t seen a fuse box in my truck?

@ormandhunter3546 Год назад

Thank you, Sir

@kimberlyserrano4047 3 года назад

That was really helpful. I have a 2014 C250 and her panic button on my fob isn't working...help! 😥

@Dave187gansta Год назад

Will this work if my issue is that my car won’t start. I put the key & No dash lights pop up or beeping sound, only doors work open & close. Trynna find out if my key is not communicating with my vehicle ignition , will this help start my vehicle again the 10sec instructions?

@ruwhaalafrika3855 2 года назад

Good evening.. I have a 2005 model W169 A170 and everything works, but my steering doesn't unlock, therefore I can not start my car, because the steering is locked.. I need help please, which fuse do I replace because my fuse box is located under my feet, driver's side, (RHD)

@simcoe1000 4 года назад

Thanks! Great video. Just re synchronized my key!! Works now!!!

@AllanLopes Год назад

thank you!!!!

@shirleyeasterling9902 3 года назад

I have a 2003 SLK 320 i have two of the keys but dont have the remote key were can i get the main key from

@Samson-EC 2 года назад

What does it mean when there is no light when I press any button, but the fob is working. Batteries are low?.. thks..jc

@riversmart 4 года назад

Thank you for sharing you information!

@lillkitty491 3 года назад

Hey I love watching ur vids and I just wanted to toss some random wisdom around the key that's hidden inside of the fob is called a valet key

@greenchryslerguy482 3 года назад

He showed it guy lol

@senilassed2982 3 года назад

I have an 2000 e55 amg and It doesn’t have a fuse box in the trunk so where is the antenna module AAM fuse located in my car ? Thanks

@markbaker5366 4 года назад

My 2006 ml 320 the passenger luck don’t go down... can u tell me how to fix it ?

@valgal9819 2 года назад

I have two key fobs. One works but the other doesn’t. Does that mean basically that fob is bad? Any advice thanks.

@VilasPawar 5 лет назад

Hi .. I have 2006-C280 4matic. Both my key fobs looks good. Battery changed & even I synchronized keys. Issue is both Infra red key fobs sometimes work sometimes don't. Yeah bit strange but it acts funny. If it doesn't open door in first attempt then even if I try hard & multiple angles it will not start. Any idea what's issue?

@lightwatermusicmarketinguk7833 4 года назад

*****Thank you so much Buddy, its certainly HELPED ME, MY Mercedes key fob Button Locking problem sorted, you are A STAR.*****

@everettdevore1072 2 года назад

Hi so my problem is with my 06 cls500 key fob was working just fine sat the car down for a week go to unlock it an nothing changed the battery in the remote I can see the red led light up when I'm pressing the lock/unlock trunk release buttons but checked the Infrared signal with a camera an nothing,, is the remote junk can it be fixed? It does look like a aftermarket remote i believe

@barjunkies1 Год назад

I have a e350 2011 I changed fuses and put new battery do u have a answer on how to fix it only locks wen I get out and close tha door if I'm outside and press locks it won't open

@caxuxi1 3 года назад

Hello there. Recently I replace the batteries but no luck. The lock and unlock buttons work, but the key don't engage to the car. I did the test with the camera and i don't see the red infrared light Any ideas

@ianwilliams2387 4 года назад

Got a w210 e320cdi estate 2000 plate been fine. Parked up but had to move. Fob wont open or close doors Key wont unlock steering so can't start. Fob key flashes red. What can I do?

@ormandhunter3546 Год назад

I have a no crank no start issue that is intermittent. Can you do video on that?

@kishorilalkishoreda5719 5 лет назад

Hey buddy my remote doesn’t work when the weather is too cold , such as 42 degrees F or lower Any idea ?

@BoBBuilder-op6le 4 года назад

KISHORILAL KISHOREDA need a new circuit

@user-cw6ld9oj9i 2 года назад

This is an EIS issue. Look it up known issue

@carlosbrown6079 Год назад

My c230 won't go over 20mph I'm told it will be about 2200usd to replace trans computer or whole trans is there anything else that could be the problem before I pay that cost

@andrewbilton5439 3 года назад

Legend

@ShinyRedR1 2 года назад

It didn’t help me 100%, but it did guide me in some tests. Who the hell knew, to use my phone to look for UV Light? Well, obviously this guy did. I narrowed it down a bit, and off to the shop next I think. I have a 2015 Sprinter Van, with about 10K on it. The other key, works well

@paulmcfall1233 2 года назад

Man, I just fixed my S550 key fob. Thank you for the help. Like and subscribed 👍

@mayjahkey Год назад

What year? I got a 09’ and it starts the car, but won’t unlock the doors

@C32used 2 года назад

I have a 2002 C32 and chrome key stopped working after it slipped out my hand and hit the floor. I have 2 other keys so it’s now I’d like to figure why it don’t work out of my 3 keys 2 don’t turn car on I put it in ignition and it won’t turn.

@rslee1197 5 лет назад

Hello. My valet key will not lock back into the key fob.

@Amoona148 5 лет назад

First of all thank you for sharing. Second after 10 seconds I hold the 2 buttons what after it? It's not clear what you said. Thanks.

@arthurtheone7527 4 года назад

Check the fuse first, if it is ok it SHOULD show some i signs of life by locking / unlocking the car. i was playing around with this thinking why it is not working and what are my next steps without checking main step - FUSE.

@awebsheep3066 4 года назад

I have an SLK from 2006, what fixed my problem was screwing back the arial. I unscrewed it after going to the car wash...... Toke a while before I knew that was the problem.

@vickiekimmel839 4 года назад

Great video. My key fob red light works most of the time when I push the unlock button and the infrared works as well. However, neither lights work when I use the lock button. Twice in the last three weeks, I had to press the unlock button many times to get it to open. Any ideas would greatly be appreciated.

@explorinlearnindoing5462 3 года назад

And what was the reason?? I have the same....( urgent) Thanks!

@explorinlearnindoing5462 3 года назад

@Mohammed Talha okay thanks... I did, brandnew... I guess its something else... I will find it. Thanks

@LoveFamilyDollShow 2 года назад

@Mohammed Talha hi can you share the video if you have it ? I can’t get into my s550

@LoveFamilyDollShow 2 года назад

What if the red LED light is on the FOB but the car will not unlock with the manual key ?

@nickd8084 5 лет назад

I bought a push button key fob after market off line but I cant get it to sync ..is there anything I can do to sync it so I can use the push button insted of the actual key fob

@marioestrada4575 4 года назад

nick dore hey I did the same thing we’re you able to fix this issue?

@DoctorTauri 4 года назад

Nice video. I have a 2003 SL500. Key works sometimes. It only works when key fob is next or near door handle. The key does light up the red circle. What could cause this?

@gregskere 2 года назад

Might be an infrared key that works only from not so long distances

@dantechmke 2 года назад

Hi there. I recently purchased a Mercedez 2002 SLK230 Kompressor and I would like to obtain 1 or 2 extra keys and FOBS before I lose one. The dealers are outrageous. And they say the car will be ruined forevvvver if you program it with anyone besides them. Any suggestions to obtain a couple and get them programmed. I have 2 originals now, but I misplaced one somewhere in the house.

@OICUR12 2 года назад

Where can you get the battery?

@geraldwilliams4026 3 года назад

What if the trunk and the unlock button is only working and the locks button isn't what could it be?

@L319DNHUSA 2 года назад

What year Mercedes is the supply to?

@mancykall7394 2 года назад

Hola, consulta tengo un Mercedes slk230 año 1999, está sin indicacion de nivel combustible, revisé el nivel local, está ok, pero sigue sin indicacion de nivel el panel, que más puedo revisar,?

@annettebirkett9275 Год назад

Hello. Mercedes Bclass 2010. Are you still giving advice. My fob is ok as far as battery is concerned. I opened drivers door with the key. I reset the ?AAM by pressing the buttons as shown and still by inserting fob car is dead. What next? PLEASSSS

@Naufan2007 3 года назад

My remote works only when placed in contact with the sensor on the door handle! What could it be?

@karenentress13 Год назад

I have so many issues with my 2007 ml 320 Mercedes. Because previous owner messed up electric system.. my speedometer doesn't work engine light on always. It's a mess now she's not shifting properly

@Tay58382 3 года назад

What does peace out mean ?

@sexylilchocolatedrop 6 лет назад

If the light on fob is not bright does that mean the battery needs changed? Sometime it takes 3 trys to get car to start and once its started if i turn it off it wont start right away sometimes.

@iRepairAutos 6 лет назад

The light does indicate battery strength in some rare instances. Change your battery. Also make sure that the infrared port on the fob is clean. Do these two things and let me know how it goes.

@CHAE2XX 6 лет назад

i have a 2002 C230 kompressor. the red LED light works, but i tried using my camera to see the infrared, i didn’t see anything. would i still need to replace it?

@iRepairAutos 6 лет назад

+Chaleisa the infrared is responsible for sending the commands to lock and unlock the vehicle. Do those functions work?

@mrHimothy2114 5 лет назад

My infrared doesn’t show but I can still lock and unlock doors but I can’t start it,,won’t crank

@Dave187gansta Год назад

@@mrHimothy2114 Did u ever found the problem on your vehicle ? I’m having same issue I’m able to lock and unlock my doors, but car won’t crank no start not even dash lights are popping up.. if you was able to fix your vehicle let me know what was the problem and how you fix thanks

@pranavkallem9823 4 года назад

The car "picks" up the signal when you press the lock or unlock buttons, as there is a small buzzing noise that lasts for approximately 5 seconds. Although, the doors do not lock nor unlock with the fob. I can still unlock and lock it via the Mercedes me app. Help?