I am ready to pull my hair out. My son and I replaced the Becker radio in our 1993 300E with a JVC KD-G230. After finishing we took the car out to enjoy the new sounds and found that the clock is not working, the turn signals and hazard lights are not working either. The brake lights do work however. We also found that the sunroof switch quit working properly. Pushing the switch to open the vent closes the sunroof and all other positions cause it to open. I did pull the knob on the sunroof motor out and I can't figure out how to push it back in. Any suggestions as to how to fix this would be greatly appreciated.

Thanks
Greg

The original radio has a fuse that was powered all the time. It sounds like that fuse is blown. The wire possibly hooked to something it shouldn't be.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Stevebfl

Where might this fuse be located? I checked all of the ones in the fuse panel and all are in good shape.

Thanks
Greg

All the affected suystems use the same master ground E1

Check the power source you tapped into for the radio. Use a Voltmeter!
I checked the JVC manual on line and connect as follows
MB Side JVC Side
Blue to Blue for power antenna
Red w/ White stripe to Yellow constant (memory)
Brown is neg ground to Black Ground
Black w/ Yellow stripe to Red switched on/off from ignition switch


If you thought the black/violet was ground and hooked it as such there is your source of trouble you are feeding +12 into a ground loop situation at E1 and into all the devices that share that ground so the work in reverse as they now have a compromised ground at E1.

Please post back if this fix works.

Try hooking the red/white MB wire to the yellow new radio harness wire and the black/violet to the red new radio wire and brown to the black new radio wire

I got most of it squared away yesterday. The turn signals turned out to be a broken ground wire. The 4ways and clock turned out to be a broken wire as well. I had 12V at the radio, but nothing at the clock. I rewired from the red white to the clock and everything started working again. I verified my connections and I do not have any power going directly to ground that I can find.

The sunroof still has me perplexed. I believe that the problems are coming from the fact that I pulled out the white knob on the motor and now I can't figure out how to push it back in. Any suggestions on how to get that knob back in?

Thanks
Greg

The problem was the knob. I got it pushed back in and timed the sunroof witht he motor and all is well.

Thanks