I still have the burnt out bulb indicater on the dash lite up. I have checked ALL bulbs and they are all lit.
I am thinking it is the control unit that measures the resistance which changes with a burnt out bulb. Anyone know specifically where that control unit is?Think it may be defective.

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John B

Are you sure you checked ALL of them?
Licence plate lights, third brake light, high/low beam lights, brakelights, back-up lights ?

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2007 C 230 Sport.

Did you check out the tail light assembly that I mentioned in your other post?

It cured the same chronic problem in my mom's '99 E430.

The local Mercedes independent that I mentioned had a stack of defective assemblies in the back of their shop.

The owners of the shop are both former technicians at Penske Mercedes dealer in West Covina, and both techs have attained the Mercedes Master Guild Technician level several times over. It doesn't get any better than that.

They were notified of the problem by their contacts at Penske of the ever increasing problem....

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".