5w155t0ny
Senior Member
- Joined
- Oct 18, 2021
- Messages
- 158
- Reaction score
- 205
- Your Mercedes
- R230 SL350
Evening hive mind
Brain picking time.
I have an R230 350SL, and the head unit has not worked since I got the car two weeks ago.
When I collected it there was a legacy error message in the dash relating to the batteries, which have apparently been changed.
Starter battery was flat, so I took it off and charged it and after refitting, cleared the dtc for the BCM (red dash warning)
Since then, there has been 1 brief reappearance of the red dash warning, which then cleared itself and hasn’t been seen since.
The battery circuit is showing 14.1 volts at idle and whilst driving so looks like the alternator is also playing the game.
Seems a bit unlikely that the head unit is u/s so looking for ideas to fire it back into life.
Handbook gives basically bugger all information as to which fuses should be checked and the location. Have checked the fuses in the rear luggage storage and they are fine, ( however, there is no fuse number 77, which is supposed to be the one for the ICE) so what next?
The car is a 2005 but the facelift with the newer dash, if that helps.
Sorry for the essay, any help appreciated.
Brain picking time.
I have an R230 350SL, and the head unit has not worked since I got the car two weeks ago.
When I collected it there was a legacy error message in the dash relating to the batteries, which have apparently been changed.
Starter battery was flat, so I took it off and charged it and after refitting, cleared the dtc for the BCM (red dash warning)
Since then, there has been 1 brief reappearance of the red dash warning, which then cleared itself and hasn’t been seen since.
The battery circuit is showing 14.1 volts at idle and whilst driving so looks like the alternator is also playing the game.
Seems a bit unlikely that the head unit is u/s so looking for ideas to fire it back into life.
Handbook gives basically bugger all information as to which fuses should be checked and the location. Have checked the fuses in the rear luggage storage and they are fine, ( however, there is no fuse number 77, which is supposed to be the one for the ICE) so what next?
The car is a 2005 but the facelift with the newer dash, if that helps.
Sorry for the essay, any help appreciated.