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#1
03-17-2012, 02:18 PM
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faulty lamp indicated, 98E300TD
I have been chasing a faulty lamp notice for some time. Turn on the running lights with car off gives me nothing. With the car running I have a lamp out. For the life of me I don't know where it is because everything is working. Is there some place that tells me which lamp the computer thinks is out?
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If it's not fun, it's too much like work. 98 E300 TD 176k miles Greasecar Two Tank Stock prefilter/fuel thermo bypass w/ Napa prefilter 
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#2
03-17-2012, 02:41 PM
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Speaking only for older W210 and W124 cars, the lamp-fail module does not say which lamp is out. Often the "bad lamp" is merely one with corrosion on its socket. Cleaning all of the contacts with metal polish is a lot of work but that's what it may take. Be careful using either sandpaper or steel wool: some of the contacts are plated. You can scrub the plating off if you overdo it.
Another possible problem is that a bulb is the wrong one for the socket it's in. Mercedes designed the lamp-fail module to expect each lamp to draw a certain amount of current This causes a voltage drop in a resistor in the module and the voltage drop is sensed by a semiconductor device. Too little (or too much?) current causes an error signal and illuminates the warning that you are seeing. So there may be no easy fix. If a lamp has burned out, no problem. Otherwise you have to work through the lamps and their sockets one by one until you find the bad one. Jeremy
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 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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#3
03-17-2012, 03:00 PM
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Bought the car with no front running lamps. Found one for $9 another for $20! The look the same for the most part but the $20 Napa bulb I was told has some sort of focus tip to it. Hate to drop another 20 to see if that is it.
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If it's not fun, it's too much like work. 98 E300 TD 176k miles Greasecar Two Tank Stock prefilter/fuel thermo bypass w/ Napa prefilter
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#4
03-17-2012, 03:53 PM
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Quote:
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1987 300TD 309, xxx 2.8.2014 10,000 mile OCI Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous “Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss
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#6
03-17-2012, 11:35 PM
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Turns out my son said "Oh,yeah, the front side marker is out."
DOH!(headslap)
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If it's not fun, it's too much like work. 98 E300 TD 176k miles Greasecar Two Tank Stock prefilter/fuel thermo bypass w/ Napa prefilter
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