Hello out there!
The instrument cluster went out on my 90' 420 SEL. I started the car a few weeks ago and the fuel, temp, oil pres and speedometer were all dead. I pulled all the fuses to make sure they were not blown and making good contact and the instrument cluster started working again. This time it is out for good. I Did the same thing with the fuses and nothing, and now, my brake lights are out as well. All fuses are ok...Any thoughts would be kindly appreciated.

Thanks

OVP or OVP fuse may be the problem.

__________________

Present
1987 300SDL
1991 300SL
1990 560SEL
2001 ML320

Past
1969 200D 1979-82
1983 300SD 1984-85
1972 250C 1982-02
1995 S350 2011
1997 S320 2012

Thanks NJ300. Where is the relay located so I can check the fuse? 90 420 SEL.

Its may be near the brake booster (inboard) on the back firewall. Small cover, mine is clear. Uses a "U.S." style fuse. 10 amps ONLY.

__________________
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

Thanks LYL I will check it out tomorrow

Hi Lyl, I checked the fuse and it is ok. I was thinking it could be the OVP relay but wouldn't the fuse have blown if there was any problem in the circuitry? Any other suggestions would be appreciated.

Thanks

Could be any number of things. I am not sure about the OVP relay being the problem, but they can go bad. Maybe take yours apart and decide if you want to refresh it. I re-soldered mine, it was pretty bad.

__________________
1991 560 SEL / 185k miles
1992 750il / 17k miles - project car