My bad, 'bout not posting the year. Yes, it's a 98 c280. It started to happen about 5 - 6 weeks after the major tune up.

So, there's no OVP?

"There is a component on the car which in a way substitutes what the OVP does. It's in the control module box, it's called the fuse and relay module (K40 I believe is it's identifier). It may cause this, it has the fuel pump relay in it, etc, helps distribute power to various control modules. "

It's been scanned for trouble codes and nothing comes up.

I will state your trouble shooting thread with my mechanic when I bring it in tomorrow.

Thanks Gilly.

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