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1990 Mercedes-Benz 300D Questions

Get answers to questions about your 1990 Mercedes-Benz 300D at RepairPal. Find solutions, diagnose problems and get back on the road.

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14
questions

Would like to know how to check the current and working condition of the glow plug relay before buying a new relay or new glow plugs. Plugs are 3 years old.

My question is on using the service .

My interior light does not come on when when I open either door. The light does come on with the light switch. Is there more than one light in there and how do I get to the bulb(s)?

The car lost power when driving and was only going 5 mph. What may this be?

car smoke when frist starting. what can i do to stop from smoking

My MB is actually 82 It will start in nutral,could it be relay?

has no problem shifting thru 1st & 2nd but doesn't always hit 3rd. fluid level ok.

The pre-ignition rely/coil that sends the spark to the glow plugs fail to activate some times but it is totally random. Is there some way to activate it manually and/or reset it so it will work normally? Seem that if you can get the car started [in warm weather] then the rely starts working again by itself. But car won't start in cold weather without it!!! Help Please email address davidjsloan2@yahoo.com

Oil sludge has been entering the coolant system for several years. Overheating has started. The coolant system needs to be thouroghly flushed and the gasket for the engine leak needs to be replaced. All of the hoses for the radiator needs replacement

Cost of new starter