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Discussion Starter #1
I checked the fuse in the dash and in the trunk but the radio will not turn on. everything else works on the console just the radio and cd changer does not have power. Any help will be greatly appreciated. This thing is driving me crazy. My car just went out of warranty so kinda out of luck there. :mad:
 

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222.132 & 221.122 & 213.050 & 906.633
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I checked the fuse in the dash and in the trunk but the radio will not turn on. everything else works on the console just the radio and cd changer does not have power. Any help will be greatly appreciated. This thing is driving me crazy. My car just went out of warranty so kinda out of luck there. :mad:
Pull the head unit out and check the power pin at the connector. Check that the connector is securely attached. Be careful with the fibre cables.

I guess you mean the head unit does not turn on even from the on/off button?
 

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Discussion Starter #3
I did that already, opened up the Cd changer and the command unit and checked all the connections.
 

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I did that already, opened up the Cd changer and the command unit and checked all the connections.
And what was the voltage on the circuit 30 wire (you must have measured that if you did all of the above).

Did you check if there is a separate fuse at the rear of the head unit? I think the W211 Comand does not have it but I'm not sure.
 

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Hey there, did you manage to solve this problem? I am having exactly the same issue. After washing my car, (nothing in the engine compartment) my Comand system wont turn on. Everything else works fine, it seems that the power is not coming through. I checked all the fuses and they seem to be just fine.

Any help would be appreciated!

Thanks
 

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2005 Brilliant Silver E55 AMG
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Hey there, did you manage to solve this problem? I am having exactly the same issue. After washing my car, (nothing in the engine compartment) my Comand system wont turn on. Everything else works fine, it seems that the power is not coming through. I checked all the fuses and they seem to be just fine.

Any help would be appreciated!

Thanks

I think I may be having the same issue? My comand LOGO screen comes on but thats it? Did yours ever come back alive?
 

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222.132 & 221.122 & 213.050 & 906.633
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I think I may be having the same issue? My comand LOGO screen comes on but thats it? Did yours ever come back alive?
It does not seem to be the same issue if you get the logo screen while the others did not seem to power on at all (at least this is what I understood from the descriptions).

This sounds more like a MOST ring issue, either a loose fibre connector somewhere, a bent fibre cable or a bad control unit in the MOST ring.
 

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2005 Brilliant Silver E55 AMG
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It does not seem to be the same issue if you get the logo screen while the others did not seem to power on at all (at least this is what I understood from the descriptions).

This sounds more like a MOST ring issue, either a loose fibre connector somewhere, a bent fibre cable or a bad control unit in the MOST ring.
Could my issue possibly be a fuse?
 

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2007 Mercedes E320 Bluetech
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I have a problem with my navigation on 2007 E320 Bluetech 48k miles. Comand LOGO screen comes on but that's it and I after 20 seconds it turns off. Any info?
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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Of course have the battery load tested first, it may be fine. If it is not then replace it.
If the problem is occurring with a good battery then the AGW needs to be checked with
a MB SDS computer. That is what failed on mine causing the unit to not power on or
randomly reboot several times a minute.

If it is the AGW do not let the dealer charge you $1400. MB has rebuilt ones with the same warranty for $219. About 2 hours to install and code to car.
 

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2007 E350
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I have same problem with my 2007 e350 - power on, MB logo shows, then disappears. I was replacing a couple of fuses for the power outlets, and had tried to find out which fuses are for the power outlets. So I might pull out one, but might put it pack to a wrong slot. Can any one tell me which fuse is for the radio/navigation console? Thanks. Jing.
 

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Outstanding Contributor Always Remembered RIP
216 with everything. 2002 SL500 with everything. 2009 SL500 with everything.
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If you feel that you have put the fuse in a blank slot,,, its quite easy to correct it,.

Just look in the fuse holder and you should see the metal connections both sides, if only one connector in one side then that is a blank hole, and no fuse should be in there.
 

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Hey there, did you manage to solve this problem? I am having exactly the same issue. After washing my car, (nothing in the engine compartment) my Comand system wont turn on. Everything else works fine, it seems that the power is not coming through. I checked all the fuses and they seem to be just fine.

Any help would be appreciated!

Thanks
Same issue
after detail my comand wont power on and when it finally did the radio has static and suddenly stops working

Any advice
 

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Hey there, did you manage to solve this problem? I am having exactly the same issue. After washing my car, (nothing in the engine compartment) my Comand system wont turn on. Everything else works fine, it seems that the power is not coming through. I checked all the fuses and they seem to be just fine.

Any help would be appreciated!

Thanks

I think I may be having the same issue? My comand LOGO screen comes on but thats it? Did yours ever come back alive?
Yes it did but shuts off whenever
 

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Purple Moderator
99 ML430, 00 ML320, 05 E500 4matic Wagon
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The COMAND unit is having a problem or as in my own case the AGW went bad.

MB makes a remanufactured AGW for under $300 and about 2 hours of labor.

If it is not the AGW and the COMAND needs repair there are specialist that can repair them for for a few hundred dollars. A new COMAND is over $3000. They used ones on eBay are good value, but sometimes also have problems.
 

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2008 E350 4M, 2016 Audi Allroad, 2019 Audi Q5
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Before replacing the agw make sure it's not one of the modules. Mine powered on to MB logo then shut off. I installed the bypass adapter between each module and on the telephone module it suddenly worked. Solved for $7..I'll replace the telephone module later.
 
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