I can't get my Interior Cabin Light to come on when door is open on my 85 300D. It drives me crazy because its one of those things that says my car is decaying and turning into a junker. I always want every detail to work.
The behavior started when I disassembeled the car for painting and took apart a lot of stuff.
The Service CD has no wiring diagram!

Is it just the drivers door?

When mine wouldn't work I tracked the problem to the buzzer relay under the dash. The drivers door switch circuit goes through that relay box because the switch also controls the "you left you lights on" buzzer. If it's just the driver's door, that's where I would start.

You must provide us with more information so we can help you...

1. Which cabin light -- front or rear -- or both?

2. Which door or doors?

3. Will the light(s) work with the switch, just not with the door?

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

wouldnt it be funny if he just had to flip the switch to the right position

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

Ah, good point! It took me awhile to figure out how to set the switch, since it isn't labeled, or mine has worn off. My 124 was even worse, the electronic timer mechanism was defective so I was trying to get something to work that was not capable of it!

__________________

"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

The 54-410.pdf is 246 KB and too large to post here so I posted it on Zshare a free hosting site where you can download it.

Seatbelt warning device, ignition key, lamps [USA] starting 1978

54-410.pdf - 0.24MB

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1985 300D Turbo
"Evolution is God's way of giving upgrades" Francis Collins