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Resources for the Repair and Maintenance of your Mercedes-Benz 300SD

Mercedes-Benz 300SD Models:

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Mercedes-Benz 300SD Problems

Electrical & Lights -- Verified

The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.

Miscellaneous -- Verified

Due to wear, high usage vehicles can experience ignition lock and tumbler failures. The ignition lock cylinder will generally require replacement to correct this concern.

Miscellaneous -- Verified

Problems with the pneumatic system can cause closing assist and door lock issues.

Engine -- Verified

Oil leaks can develop around the oil filter housing.

Engine -- Verified

Fuel leaks can develop around the high pressure fuel injection pump.

Mercedes-Benz 300SD Questions and Answers

MICKEY007, 1992 Mercedes-Benz 300SD, Madisonville, KY

I have not done a compression test, but the head gasket is suppossed to be blown. Now my question is will this keep it from running?

Robkabob55, 1992 Mercedes-Benz 300SD, Phoenix, AZ

Prior to no start, engine wouldcrank weakly, as if battery was dying but would start right up with jump. Battery is charged. After no start, cleaned terminals and cable ends of corrosion. After tig...

Visitor, 1992 Mercedes-Benz 300SD, Washington, DC

see summary

ncdiseal, 1992 Mercedes-Benz 300SD, Greensboro, NC

when i put the car in reverse the engine revs up and jerks in to reverse. also the ac or heat wnt blow out the vents

richard.sun678, 1992 Mercedes-Benz 300SD, Rancho Cucamonga, CA

How to fix a fuel leak from the retangular-shape plate cover fasten with 8 boltd to the side of the Injection pump body. Is there any disassembly drawing of the Injection pump available? Please not...

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Mercedes-Benz 300SD Reviews

Beautiful road car. Well balanced. With me, a full tank of fuel and a suitcase in the trunk the car has 2500 lbs on the front axel and 2500 lbs on the real axel. Has long legs (28 gal tank and 30 MPG on the road) which gives me an 840 mile range to fuel exhaustion.
I had just about everything replaced under MB warranty (new factory crated engine, turbocharger, A/C evaporator, water pump, valve guides, front springs, shocks, control arm bushings, engine boost sensor, manifold pressure sensor, crankshaft position sensor, engine mounts, Glow plug harness, Engine Harness, and a few other things). The car is a dream to drive. I have spent 33 hours at one time and felt great. Just roll the seat back for a nap and wake up and start driving again.
If you are considering this car make sure you have a new, or remanufactured engine as the original engine had rod problems. Look for one where the owner has ALL the paperwork (preferably from an MB dealer) on all work and has a complete set of maintenance records. It’s not a car for the back yard mechanic and plan on spending a few bucks on routine maintenance, but if you want a car that you can ride in all day and arrive in comfort. This is the one to own. The car is equipped with thermo pane windows which keep the noise and cold out. Car is very quiet, most don’t even know it’s a diesel. Very responsive (for a diesel) and handles like a sports car.
This car is still in style even after 20 years. This was the Princess “Di” car and had she been wearing her seat belt she would still be alive.
I rated the engine and A/C down for the original equipment. Once replaced I would give it a 5 star.

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