How to Troubleshoot Audio & Navigation of Mercedes E320 / E350 2002 to 2008 for Repair. 

Thank you so much for taking the time to reply. I shall check the other components. Thanks again. Have a great weekend.

Awesome video very clear easy to follow I’m ordering the bypass loop now can’t wait to see if this works!

Thank you! Very useful information!

Very informative video. Thanks for posting this.

Your vids has been extremely helpful thank you for posing 😊

very clear and concise! your english is great brother! great video :)

Helped a lot thanks

Excellent video!

Amazing thank you for explaining everything very easy to do the work love it thank you.

Awesome video! Thanx SSSSSSOOOOOOOOO MUCH for this..... very indepth and informative.... thanx again...!

Thank you so much for video!!!

Thank you so much! You helped me get my sound back! My Navigation is bypassed but at least I now have my radio back.

Very good very helpful thanks

Greatttt men thank you so much for this INFO! But for the mercedez Ml320 the Bluetooth system is just behind the front desk and you can plug in there!!

my radio unit does the same. the problem that the AGW and the Radio draining the battery, i took out fuse 6 in the trunk and fuse 26 near the driver side. does it worth to buy the bypass lollipop and give it a try, or need to replace the AGW. Thank you.

Thank you.

Thank you your video is awesome 👌

Very nice explain he helped me a lot you are good in what you do thank you

Excellent video, very clear and understandable!!! It helped me to get my sound back (it was the TELEAID module and we just bypassed it as per the video) THANK YOU SIR!! Unfortunately I spent some $$$ before I saw the video and the fix in the end was $20.- and I did it myself! :)

Hello, I recently updated the comand aps version on my Mercedes e320 cdi estate (s211) from the version the car came with to the latest, since the update, when I click on the Nav button there is just a blue screen and I don't have a navigation anymore, if you can help me I would be very grateful. Thanks.

Hi this is a great video. My CLK350 comand when turned on will show MB logo forever never turn off but nothing else works. i tried to update the NAV but after that. nothing works but the MB logo. Could I bypass the NAV? Have to take out the COMAND unit? CD audio works but the screen is only shows MB logo forever.

my GPS is not working. what's the problem? Nav unit in the trunk broken? also maps not working,

Best video buddy I save so much money thanks to you

What steps should I take if after jump starting my battery the unit does not turn on at all? No power seems to be coming to the unit.

hi i have a ml350 my navigation and audio do not work. Please advise... I was told by a shop that i needed a part ordered which is under neath my seat but im not sure.

Greetings… thanks for the informative video. In my case nothing comes on at all. Fuse is ok so what else should I check?

Thank you i will bypass the teleaid so I can have the radio working again

Hi I have been using the bypass but I noticed that when I removed the fibre optic cable from the audio gatewayi noticed there was no red light coming through the cable all the other were showing a light ,what do you think.

my friend i love you u tube video. I have a 2006 cls500 mercedes and the navigation is not loud any more, the navigation works, the maps also works but we dont know how to have it loud again, it also says to us that the navigation is not actived what do you think i have to do? Mercedes logo works when we put the radio and radio works cd player works but the voice for nav.gps is very very low. thank you for your help

I have a ml350 and the system turns on the logo doesn’t go away non of the buttons work but the cd audio plays I just can’t use the nav/backup camera/radio what do you think the problem is?

hey my cd player dont read cd box and didnot give sound any help?

Hi, Thanks for the video. Is there a way to add Bluetooth functionality ? Mine is Japanese command and it doesn't have Bluetooth or aux.

I have a 2007 ML350 W164. The radio works but the screen just has lines running through it. I think the screen is bad but think a aftermarket system might provide more options

Hey there again you wouldn't be able to tell me how to make my cars fade ability work on my 55 w211 Mercedes it has the same stereo I have a 2006 model car and it will let me adjust the fade front to rear but the 2004 car will not exact same stereo and both cars. And I was wondering if you might be able to tell me how to change this through the developer menu or engineering menu?

I had battery charged because car sat for 3 weeks . Then I noticed static on radio, & navigation wasn't working . Then again after 5 days - car not driven -I just had to get a new battery & maybe they (AAA) disrupted the wiring . Is that possible ? Should I go to Electronics person or garage ? This is great if I knew what to do . Thanking for making video , linda S.

Hi, I've got the same problem, but in the 2003 Mercedes E240

Hello Mister, thank you for detailed guide! Very useful. I tried searching for my problem here but didnt find any answer - My 219 Cls with PremiumAudio(HarmanKardon) should have the option for SurrroundSound/Logic7 music modes, but it lacks it. Only the fader and balance, bass and treble can be controlled from Comand. Do you know if that could be a problem with Audio Gateway, or more likely to be Comand's problem? Have a great new year's start! Cheers.

Hi there, I purchased a GL450 2009 and the cd player took the 6 cd's with no problem, but, after a family trip it didn't eject them, so, I took the command control out trying to fix it, couldn't do anything since is too complicated for my electronic knowledge, so, I put it back, hook up all the connections exactly like they were before, but, now it doesn't turn on at all,, can you please advisement? Thanks in advance

Thanks for sharing this information !! I have a c230 2005 and I just added a Sirius unit, for satelite radio. May I used the roof ( back ) antenna to connect to the satelite radio? the antenna is the small black stick in the back. I think this was used for the tele Aid ( not installed in my car) Also I'd like to know where I can get the cable terminal , ( what side of the vehicle) I saw like a double connection in the left back close the the fuses. thank you !

Hello, do u know where is those modules are in mercedes sprinter 2008?

Great thanks They said it was the comand unit after bypass search my Telephone module causes the problem but we didn't use it any way so Let it with a bypass thanx

My system powers on but without display n no sound or anything. The fuse for antenna is blown so I went to chg it n it popped before I could even plug it in twice! Short?🤷‍♀️ I bought the lollipop so I’ll try these suggestions n see… thank you so much for your awesome videos!!!

the head unit in my 2008 cls63 recently started turning off then on randomly. along with this came a "popping" or "cracking" sound from the speakers every 10 seconds or so. considering the fact that im getting cracking and popping along with the radio shutting itself off, it's more than likely the amp, right? anyone on here have any input? all fuses are fine

I've connected those two fiber optics wires without a loop. now command unit is showing mb logo and nothing happens then- just a logo. before the logo came out and then the unit was turning off. what should i do next?

my Mercedes Benz C230 2005 has challenge in music player.... when the music is playing, for about three seconds, a beeping sound will interrupt, it will continue like that until one minute latter, the music will stop to play completely...... what do I do????? please help.

Very good presentation! I have a problem with the CD changer - sometimes it works well and then just stops and shows a message that says 'Error CDx" where x is 1 up t0 6. what can the problem be?

Hey guys, I've had a 2008 Mercedes Benz E350 for 2 years now. The Harmon kardon Logic7 sounded amazing. Until one day my CD changer stopped working while I had CDs inside . I've been reading forums and some people said to remove the fuse for AGW, the CD changer and the radio. I followed the steps took the fuses out, put them back, and at the end the CD changer started working again. But ever since I removed the fuses and put them back into place, my sound has not been the same. I used to get powerful bass from the front speakers, and the subwoofer , and an awesome clear surround sound experience. So much question is do I have to go into engineering mode to get the sound back, or what do I have to do to get the sound? Because I believe that after removing the fuses I must've messed up a component in the radio system that has to be readjusted. I still get sound, but it's not the same as it used to be before I removed the fuses. Sometimes I try, and I put the bass to maximum, and nothing happens. Guys please help me.

Hi, thanks for the video, very eye opening. I'd like to ask what I think is very important regarding the modules that connect to the radio in the cockpit. Are the fibre optic cables navigation, audio gateway, voice module, etc multi-mode or single-mode? I'm asking because I removed the Bluetooth dongle from inside my armrest compartment to free up space for my actual phone, and that caused the radio to stop working. I'm just wondering if I can splice the in and out cables to close the loop. Thanks.

In that box is a small fan that stays on when my doors are locked and car is sleeping. Thats why my battery is very weak.. also navi is not working.. 320cdi '07.. where i can find new one?

Hello, my comand unit NTG1 does not start when i push the Power button. Sometimes it does, but most times not. Most times, I would pull out FUSE 26 from the Radio Unit, and it would start. Now, even if I do that, it still wont start. I have bypassed the Navigation unit and the Tele-aid in the trunk, and still does not start. I suspected the AGW but after seeing your video, and listening, I think for sure it's the comand unit. PS: I don't have CD changer. Any sugestions?

hey, i have a 2007 ml350 and when i turn the car on, the audio works then it cuts off after two minutes. I used the bypass loop for the amplifier and tele module checked the fuses but it still doesnt work.

Thank you for the video Do you guys fix ecm for 06 e350? Thank you

Hi, I have a Mecerdise 2003, E320 and the two sides of the rear signal is not working. But the front is ok

Hello. My radio occasionally works, but more often lately it doesn't work at all .No logo and CD changer doesn't come out either. Does that mean the radio head has a loose connection or needs replacing. Thanks

This is a great video thank you. I have just come upon this problem.

Hello HiTech, My wifes 06 ML350 has the nav command radio. My problem is the mercedes logo comes up and never goes away. The radio will play the last station tuned into and volume level works. But the radio will not change any stations as only Benz logo remains. It does not go to sleep, just stays on one station and is locked up. Maybe nav system is faulty as yours in the video. I guess I need a lollipop to try. Suggestions appreciated. Thank you, Craig

,everything works except my Nav and Map, what could be the problem, and how to fix it. Nav message says Navigation Device Unavailable how do I fix this, Thanks, great video

My 2008 GL450 has radio static like blown speakers for about 5 minutes then clears up and sounds perfect CD and satellite radio sound fine all the time do you know what the problem is I changed the amp under the driver's seat same issue no one seems to know the issue

What do you suggest replacing if all audio works but is distorted? also navi comes on but does not function. disc is in.

Plz some body can tell me I have e220 year 2002 diesel 2.2 automatic shown abs srn problem I checked the fuse but it’s ok macanic he told me to buy whole the part but it’s too much expensive almost 1900€ thanks in advance

my gps does not work and cd changer does open, but all the sound works and will play music from the cds. i can listen to music for 30 minutes then it shuts off. where do you think the problem lies?

My 2005 e200 has sound for a while and after 15 minutes the speakers begin playing soke metal , screeching sound. Hard to explain. What could be the cause?

I changed the car navigation from the back and even the audio gateway which were used on another w211, and i still got the same problem, it turns on and off, could be the voice module or the taillight module?

where is that cable for that bypass to mount at a mercedes ml 320 of 2007 because have the same problem and is identical the same radio. have taken apart all the back upholstery and see so no system

I have with my command this problem, when I push the button Audio, CD is grey and not awaible, the same with SAT and DVD and the button eject don't work, have you any idea? Regards Antonio

Hi! My 2007 e350 radio statics now after i changed out the battery. The fuses are good. What do you think it could be?

hello grate video you covered every thing clear thank you. my 2009 e350 was setting like one year i had to replace the battery now the radio comes on and of when on i can not control any of the knobs like it is stuck on one station sounds like am. some times it would works every thing is good but then it goes back to am radio- oh and some times the radio goes it turns its self on wit no key in the ignition. i am hopping you familiar with some thing like this - any help would be wonderful .my name is peter

Thank u sir i have same problem for w203 how to do that plzzz?

I have a 2012 cls550 rear doors and deck plays lower than front..before it wasnt doing that do you know can cause that everything else works fine what module can that be

Great!! Let me ask you a question: what if a change the unit for a new one that comes with CarPlay, this problem will go away or I still have to bypass ??

Where do u get that bypass clip

My 03 e320 turns off every 3 mins but does it only at night what do you guys think it can be?

What fuses on the side is it i don’t know which ones is it

I have one issue the Comand is SLOWLY loading.. might take 5 minutes sometimes might take 10 minutes.. when I shutdown the car and start it again no problems but If I leave the car for 1 hour without the engine on .. Comand loads so slowly..

Okay bro i bought loop my voice module was bad so gkt another voice module the cd went bought 6 disk off ebay now all works but sound cuts on and off

Okay i did it got my sound and radio back. I bipassed all componets it was voice module. I still have sos error but command unit and cd changer sound work

I recently had rear sam replacement and now I can't get my radio to turn on please help

Question completely different from the radio. My key fob is stuck in the ignition I can turn on the car but I can't take the key out any suggestions? Please and thank you !

Hi sir is it podia let that cl 500 year year 2004 the same thanks again you were so helpful I would have seed hours looking for that prolem

Hello, I have a 2008 ML550 and the center screen and it's accompanying buttons have recently become unresponsive. None of the buttons work, besides the power button. The screen does show the screen, however it's only stuck to whatever I'm looking at, as I cannot change the source due to the buttons. Any suggestions on how to fix?

Thank you. The video is very helpful. I have a 2007 ML350 with Harmon Kardon upgraded sound system. When I turn on the care, everything works, but after a minute or two the sound cuts off. I have tried replacing the Amp and the Audio Gateway under the seat with used ones I found I found on eBay, but the issue could not be fixed and I have tested the Command unit and that is fine as well. I did not however use a scanner to reset things after the installation of these components. Do I need to do that before these parts start working or could the issue be something else I am missing. Thank you in advance for your response.

Thank you bro I have maybach 240 sound volume to much again radio came on and off

I just got a 2006 Mercedes’ that looks exactly like this but I cannot connect my phone Bluetooth or map to it. It shows phone not installed, please what can I do?

Thank you very much for the info. My cd is the problem where 2 cds stuck in it. How to pass it only?

Were do you buy the by pass module

Thank you for the video. If volume knob on command unit doesn't work but the volume buttons on steering wheel do work, which module should I take out? Thank you.

What’s the average price for someone to fix this problem if i was to take it anywhere ?

My 2002 s430 radio display is not working. The radio and all the functions work fine but no display. I can listen to the radio and changes station but the display is black. Any suggestions?

Great Video, thanks . a bypass loop on navigation brought audio back up, thanks . Can bad navigation cause the SOS malfunction message to pop up? Thanks again!

My car was doing the same, it turns out the #6 40 fuse was out. I replaced it and everything is working just fine

I bought male and female loop connectors...but do not see a fiber optic plug going into the teleaide module...there is a plug, but it is not the same as the loop and the wires going to it are black... help me please!

I have a E350 2006 Benz and my battery keeps draining. We think we figured it out and believe that it’s the navigation system in the trunk and radio. But someone said I may have to look into taking the car to the dealership about the audio gateway for the radio. Any suggestions?

Hello thank you so much for this video. I have a 2003 e320 and the radio/cd player intermittently stops for 5 to 10 seconds and ive just placed an order of the lollypop. Where do you suggest i bypass first?

Hello, how are you? I had a problem with the battery, it drained quickly, so I took it to the Mercedes maintenance specialist, and something was separated in the trunk , and the problem disappeared, but the radio became stuck on the Mercedes logo. Do you expect the problem from the navigation unit?

My central display and radio is not working, all fuses are good including radio fuse in the back. Still no power what shall I do

Hi. I have a 2008 e350 and my radio turns off after 30 minutes of driving . my controls at the wheel don't work now all I did was disconnect the battery . when I go to service and then time it tell me , please turn on the ignition . this is when the car is on . any idea what it could be?

For the tele aide module will it need flashing or programming for installation.if im switching it out with one from the junkyard???or is plugging ready ?direct swap??

I have a 2007 E350. When I insert the Nav DVD in the trunk my screen says to insert the disc. It my Nav not able to read the disc. Maybe it's not recognizing the cd has been inserted. What suggestions do you have for this error. Thank You

I own a 2003 E320. When ever the temperature gets above about 82 degrees the radio stops working. I push the off/on button and the logo comes up but goes away after a few seconds. If for some reason the temperature drops down to below about 82 the radio will spontaneously come on. I can also start the car, get in the trunk and disconnect the battery. Turn off the car, reconnect the battery and the radio will come on regardless of temperature. I do not have a Nav system. Any ideas?

Can’t connect to Bluetooth one I hit cdc idk how to change it from track list to the Bluetooth setting pushing 6 don’t do anything