The lamp out indicator on my 1987 300E is acting strange. When I start the car all of the indicators illuminate and go out as intended. When I step on the brake the lamp out indicator comes on and stays on. I have checked all lamps and they are ok. When I turn the ingnition off and re-start the car the lamp out indicator goes out as designed. As soon as I step on the brake it comes on and stays on. I have checked and re-checked lamps and fuses with no success. Any suggestions wil be greatly appreciated.

Thanks in advance.

__________________
Donwo
1999 SL 500 Sport (30K miles)
1998 E320 (SOLD)
1989 560SL (SOLD)
1987 300E (TOTALED)
1986 300E (SOLD)
1984 300SD (SOLD)

It may be the bulb holder for one of the brake light bulbs, according to an earlier thread. Left brake light either stays on or doesn't go on. 92 300E

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E

The indicator isn't acting weird. It is designed to come on when the circuit with a bad bulb is energized, and not before, and it resets itself after turning off the ignition.

It is telling you something is amiss in the brake light circuit. Check out JCE's tip above. You should at a minimum remove and replace the brake lamp bulbs, to clean the contacts, and don't forget the 2 bulbs in the third light inside the car.

__________________
Steve
'93 400E

Make sure to use Osram or OEM replacements, as the resistance is different than domestic bulbs. If I understand correctly, this can cause oddity in the lamp out indicator as well as potential cruise control malfunction.

__________________
Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)

Duhhhhhhhhhh!

Thanks to all for suggestions. In checking to find the problem with the lamp monitor I forgot to check the third brake light inside the car. Changed bulb, problem solved.

__________________
Donwo
1999 SL 500 Sport (30K miles)
1998 E320 (SOLD)
1989 560SL (SOLD)
1987 300E (TOTALED)
1986 300E (SOLD)
1984 300SD (SOLD)

Glad to hear it worked out. We've all done that. Unfortunately the manual doesn't explain the bulb out system very well (like to feature I mentioned, where it only goes on when the affected circuit is in use). It's pretty cool, really, when you think about it.

Steve

__________________
Steve
'93 400E