Original Radio issues (Display off but radio works)
the radio works and the buttons on the radio itself work fine but the backlight behind them does not work so you cant see them at night.
I have noticed that i cant adjust the volume from the steering wheel, and if i get to nav, tel, audio from the instrument cluster i only get _ _ _ _ some lines which feels like no communication.
I have also seen that if you remove the key from the car the radio wont turn off but i have to press the button. Normally it would turn off after removing the key
Any help appreciated.




On the dash does it always display ----, or is that only when you scroll to the Nav, Audio, Tel? if you scroll to Trip does it show all the info if you scroll down, like trip od, mileage, gas mpg?
Does the horn work?
Im wondering do you have any issues with water getting in the trunk? I believe the radio control unit is in the trunk.
Maybe try disconnecting the battery for a bit then reconnect. See if that resets anything.
i did a little searching around for issues like you list but most people have installed aftermarket stuff, like ipod adapters or aftermarket head units.
Ill do some more searching, but maybe a mercedes specific obd scanner can lead you in the right direction. It is a good investment.
On the dash does it always display ----, or is that only when you scroll to the Nav, Audio, Tel? if you scroll to Trip does it show all the info if you scroll down, like trip od, mileage, gas mpg?
Does the horn work?
Im wondering do you have any issues with water getting in the trunk? I believe the radio control unit is in the trunk.
Maybe try disconnecting the battery for a bit then reconnect. See if that resets anything.
i did a little searching around for issues like you list but most people have installed aftermarket stuff, like ipod adapters or aftermarket head units.
Ill do some more searching, but maybe a mercedes specific obd scanner can lead you in the right direction. It is a good investment.
Attached the nav pic i have.
Horn works.
Have not noticed any issues with water in the trunk.
What obd do you suggest that works for Mercedes ?




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