Sound gone off S350 W221 command

[widebodysec]

2006 S350 w221 - command issue- Hi guys, i turned the car on this morning and i have no radio staions displays nor cd or voice activation . harmon kardon logic system.

 

[alexanderfoti]

The amplifier has most likely failed (in the boot). A common fault. Some companies can repair them, but we have never had long term success with this option.

Ensure the rear battery is fully charged as well.

 

[widebodysec]

Yes i had heard a couple people on other places, With that possibility but thought would ask the proven crew here ! Thanks. Batteries are ok just think prob the Amp. Any recommendations for a repairer. ?

 

[Botus]

never seen a successful repair, in the states one guy claims to be able to do it -

one guys claims he's seeing that same "always the amp failure" mode - having been through hell with amps repairs on 2 different units - in the end linked out his factory DAB module and its now working - but this is on an amp where it doesn't spin the fan, so I'm not sure he's reached the end of his fun yet.

 

[widebodysec]

Ok thanks

 

[PurdieMerc]

Hi
I have similar problems with my W221 S550 2009 HK Amp
My Australian Indi mechanic refered me to a German repairer
https://amp-performance.de/en/Mercedes-Harman-Becker-BE7021-Amplifier.html

They look good on the Web (pics of repairs)

Has anyone had any experience with them.

Regards
Purdiemerc