Check Engine reset on 1994 C280
 

I think it's the wiring harness causing the problems, this per previous shop visit when they reset the light and it's driving fine.

I've read about some of the built-in diagnostics on the 1995 models and I've partially figured out how to get some diagnostic information through the climate control on the 1994, but I don't believe this would be where I can reset the check engine light.

Any ideas?

Thanks.

Unplug the battery for about 10 seconds.

Be sure you have the radio code (anti-theft) on hand!