CD changers, command units, voice control units, PSE units, and Tele Aid units are prone to failure, especially in early models.Google+
Car Problem Reports
Mercedes-Benz S430 CD Changers and Command/Voice Control/PSE/Tele Aid Units May Fail
Mercedes-Benz S430 Problem
Average Mileage: 88,029 mi (10,000 mi - 159,000 mi)
Visitor, 2006 Mercedes-Benz S430, 60,000 mi
CD Changer went bad 1st. It stopped working and then we began to have issues with the Main Head Unit in the dash. It turned on and off intermittently and finally went out completely. We have yet to get a proper diagnosis for this issue.
Nav unit will not boot up. Mercedes dealer wants to replace the whole unit for $4500. I don't think its the unit but a computer glitch.
Visitor, 2000 Mercedes-Benz S430, 80,000 mi
Radio and CD not stop of working. I cann't to find solution. Please your help.
At times the CD changer reports a error of "no cartridge" and it cannot load CD. Other times it works fine.
Visitor, 2006 Mercedes-Benz S430, 59,000 mi
Radsio Command Unit Died
radio/navigation stopped working. blank screen. occasionally it will start up and work. who repairs these? firstname.lastname@example.org
Visitor, 2000 Mercedes-Benz S430, 37,000 mi
no radio volume or cd changer connection
Visitor, 2006 Mercedes-Benz S430
Command unit and navigation system failure
Gps, radio works but no volume - nothing comes out of speakers. Cd changer is not recognized. Still trying to fix. pls help.
Visitor, 2005 Mercedes-Benz S430, 83,000 mi
COMMAND screen flashes on and off, radio goes on and off all by itself, no way to turn it on or off.
Looks like it needs a re-boot, but there are no directions on how to do it.
Tried different ignition keys-no effect.
Replaced an alternator just a few weeks ago.