light fault..

[initialbdriftracer]

kept meaning to bring this up , so ...
when i turn on the sidelights , the bulb failure warning comes on..
all the lights work perfect.. but one of the tiny bulbs in the heater control panel is not working.... could this be the cause...

 

[whitenemesis]

No, won't be an interior light.

Have you checked the brake lights?

 

[star]

Have you the correct wattage of rear side bulbs and don't forget number plate lamps.

 

[Steve@Avantgarde]

A tip about light warnings on Mercs.

The warning light will come on only when it sees the bulb not working, not as soon as the ignition is on, so turn the lights on in sequence slowly and see what immuminates the warning light.

For example:

Side lights, dipped beam, main beam, fog lamps front, fog lamps rear, reverse, then brakes.

When you see the warning light come on you can know straight away what circuit to look at.

 

[mersum1es]

http://www.benzworld.org/forums/w210-e-class/1334323-lights-test-lamp-malfunction-warning.html

also note correct amount of bulbs
http://www.benzworld.org/forums/w210-e-class/1515381-defective-bulb-warning.html

and then, all sockets may be corroded and thus giving false resistance...

 

[BAZZER1]

Hi
I had the same fault, see my Thread 11/10/12 and a lot of good advice given by Members, I eventually knuckled it down after checking and rechecking all Light Bulbs to a Rear Brake Light Filament which was intermittently making and breaking contact, not an easy fault to find even with a meter, so check and replace your Brake Light Bulbs with good quality ones, I replaced mine with Osram Bulbs, result, fault cleared.
Best regards
BAZZER1

 

[BAZZER1]

Forgot to mention, make sure that all of the Bulb Holder Contacts are clean and free from corrosion before fitting the new bulbs
BAZZER1

 

[initialbdriftracer]

all brake light bulbs are new..
it seems to come on as soon as the heater control panel lights up.... well, half of it...
i already had a go at stripping one down.. not a job i want to do on my own car...
i been putting up with it for a year now.. so im kinda used to it, but would be nice to have it fixed too.. cheers for the advice..

much appreciated..

 

[wireman]

My guess
One or more of the parking light or number plate lamps is tired or has dirty contacts.