On this 98 300e the middle brake light works sometimes but not all the time, the front interior light works sometimes along with the rear view mirror and sun roof, no lights on heater control unit a rebuilt one was just it worked before the new unit was put in and the heater fan sometimes works, that was y we replaced the heater control unit. Thank you for your help.

Sounds silly but I recently had to replace a rear window regulator and had the door panel apart for a week waiting for parts; therefore, the window switch and door courtesy lamp were disconnected.

That caused the sunroof not to operated properly and for the interior courtesy lamps in the rear of the car to stay on rather than fade out. Whenever I'd push one overhead control switch the wrong item would come on or go off.

Soon as I reconnected everything back up all was back to normal.

Check that all your bulbs are good. The dash will not give you a lamp out indicator for interior lamps.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

It was the heater motor that was burned up thats y it wasn't working and the rear brake light had a contact problem. But i am still having problems with the mirrors not dimming , front interior lights and the sunroof control not working basically all the things that go in to that control panel has anyone else had this problem? thank you for your info.

Check the earthing cables in your car are nice and clean.