Questions and Answers

Mercedes 300SD Backup Lights Q. I have a problem with the reverse lights and I can't find how to make them work; any place to start the inspection??? Fuse okay, bulbs okay. But there are some work with the wires and seems that all the system is okay. Except that lights. It's my first Mercedes and I'm falling in love of it. By the way, I fix the tachometer only placing a cigar filter between the cap and the amplifier. Now works as brand new.

• 1983 Mercedes Benz 300SD
• 3.0-liter turbo diesel
• Automatic transmission
• 247,000 miles and working really well!!!

Thanks again…

A. You probably have a bad backup light switch. The backup light switch is part of the Neutral Safety Switch so the whole assembly will have to be replaced.

On Left Hand Side of the Transmission

Here is the wiring diagram so you can check the wiring as well.