Mar Gia, I appreciate the kind feedback and the fact you noticed because those Mercedes BENZ key remotes can drive you crazy if don't know what to look for and often I've seen people damage their remote because they can't open the battery tray. THANK YOU _Randomfix
Hello I have a MB E350 2006 I change the battery on the key fob it stars the car but still does not unlock or lock doors cut this be a fuse problem? r you have any suggestions thanks.
Hi Hilda m, sorry for the delay, I hope this article helps figure out why your mbz keyless entry is not working. I didn’t write but I think you will find it useful. Just memory why all else fails disconnect your main battery for 48 hours if a sam ( computer module) is acting up. Please note that disconnecting the battery may cause the inspection monitor data to be erased so make sure you don’t have a state inspection coming up in the next three months. Article It’s always annoying when the key fob for your car doesn’t work. Fortunately, there are several steps you can take to address this issue. This article will explore some steps you can take to solve the problem of a Mercedes Benz key fob not working to unlock doors or a trunk. Specifically, this article addresses issues with unlocking the Mercedes Benz CLK, E C CLS, A160, C-Class C220, C230, C300, CLS, and ML models. The specific problems discussed in this article are: 1. Your Mercedes key fob doesn’t work after changing the battery. 2. Your Mercedes key fob has stopped working with no warning or explanation. 3. Your keyless remote or key fob won’t unlock doors. 4. The panic button and/or trunk unlock features don’t work. Your problem is likely that the fob can start the car but will not allow you to unlock the vehicle’s doors or trunk. In other words, it will not allow you to use the fob as a keyless entry remote. Here are some common reasons for this issue: 1. The key is defective. 2. The All Activity Module (AAM) is not recognizing the key signal. 3. The AAM is not receiving signal at all because of an antenna issue. So where do you begin to figure out the cause of your specific problem? A good first step is to change the keyless remote battery. (If you’ve already done this, keep reading.) When you press the button on your key, look at it carefully to see what happens. You should see a red LED light, and this should appear whenever the Lock, Unlock, Panic, or Trunk button is pressed. If you don’t see this light, the problem is that your key fob is defective. If the key fob appears to be working, see if the remote is transmitting a signal. This signal will be infrared, which you can’t see with your eyes, but can detect using a cell phone. If you point your phone’s camera at the remote, you should be able to see a light when you press a button on the remote. Again, if you don’t see this light, your key fob is defective. Next, try taking the emergency metal key out of the fob and using it to manually unlock the car’s doors. Then check the fuses for the central locking circuit (controls the vacuum operated door locking mechanism, which uses pressure to lock all the doors at the same time), antenna module, and AAM. Your Mercedes Benz receives the Lock or Unlock signal from antennas installed on the car, so a bad antenna module fuse can cause your key to be unable to unlock doors. Depending on the type of Mercedes Benz you have, the fuse will be located in one of the fuse boxes in the engine bay, on the side of the dashboard, under the backseat, or in the trunk. If you find a blown fuse, replace it (using the Ampere rating recommended by the manufacturer. Be careful not to use a higher rating as this can cause electrical problems.) If none of these approaches have worked for you, it’s possible that your key needs some extra work to synchronize to your car. (Usually, this synchronization happens as soon as the key goes into the ignition, but in some cases, you will need to program the fob to synchronize to your car.) Here’s how to synchronize the key yourself: 1. Put the key in the ignition. 2. Quickly remove it within 10 seconds and hold down the Lock button. 3. While holding the Lock button, press Unlock five times. 4. Release these buttons and press the Trunk button once. This should synchronize your remote. You will be able to tell if it worked by pressing the Lock and Unlock buttons to see if they work. Last, you may need to examine the AAM. (Unfortunately, if you haven’t resolved your car’s key fob issues by now, this step is a bit more involved and will cost some more money. Good luck.) Start by reading the AAM fault codes with a diagnostic car scanner. You will have to purchase this (Foxwell, iCarsoft, and Bluedriver models are all recommended for Mercedes Benz), or you can ask a mechanic if you’re not comfortable doing this yourself. To use a diagnostic scanner, turn your car’s engine off and plug the scanner into the diagnostic link connector under the dashboard. Start the car and you should see some codes display on the scanner. Follow the manual’s code reading procedure to interpret these, or look them up online. If you determine that the module is defective or programming is necessary, the scanner will not be able to help you unless it is a more advanced variety (such as Autel Maxidas or SnapOn Solus). There are different levels of scanners from simple to complex. More expensive (and complex) ones can give you the same information your car’s computer is getting. (These higher end models probably aren’t necessary for diagnosing AAM issues, but if you enjoy working on your car they can be a great investment.) If the AAM is defective, you will usually need to have it reprogrammed by your Mercedes Benz dealer, or buy a new one. (You may be able to buy a used one for less money, but if you do this, make sure it has the same last four part number as your model. Let me know what happens
THIS is the video you need to see for this model year. Too many videos only show the triangle button which has a totally different release mechanism than the circle which I have. Thank you for this great vid!
Thank God for youtube, thanks for posting this video. You saved me a few bucks had I taken my non working key to Mercedes. It cost me $1.99 to replace the battery once I knew how to open it up the fob.
Thank you!!! My alarm keeps going off randomly so embarrassing..too many videos that don't help. NO ONE shows putting nail under the silver top while moving the latch and I can never remember it's so long between changes. I have the round panic button for 2010 Glk. Thank you for showing what no one does!!!
I’m glad I was able to help with 2010 Glk. When I first started swapping out these batteries in key fob I was a little confused about the mbz remotes as well. I hope these video help more people like yourself. Thanks for taking the time to post the feedback! :)
Reza, thanks buddy for the great feedback. I was super confused when first replaced the battery untilni noticed there two different keys types. Have a fantastic day. _Randomfix
@@RANDOMFIX If you were not here, I'd damage my key following other videos, as you mentioned. I'm so greatful for your work bro. You rock! BTW thanks for caring about our feedback. Peace!
I just sent "Thank you $", I have a 2007 Mercedes with the round panic button and I started with the instructions on other videos (for the triangle panic button) but each time I inserted the key to "pop out the back" it felt wrong. I was afraid I was going to damage my key, so I'm SO glad I kept looking and found your video, it had exactly the info I needed and the instructions were very clear.
Peter, Congrats on changing your battery on your MBZ remote. Thanks for the positive feedback, do you mind sharing your results on facebook.com/RandomFix it would mean a lot to mean. _RandomFix
Thank you for this. I’ve got both style keys for the same car. Didn’t realize the battery replacement was different until I attempted to disassemble the older style fob.
Thank you so very much for doing a video on the Key Fob. One of my Key Fobs died on me and I didn't want to go to the dealer to get it fixed$$$. You are truly a blessing!
Big Daddy, I really appreciate you taking the time time to let me know about your positive experience about the mercedes key video, do you mind sharing your experience on facebook.com/RandomFix It would really mean a lot to me personally. Thanks _RandomFix
