1991 Mercedes-Benz 350SD Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Mercedes-Benz 350SD

1991 Mercedes-Benz 350SD Problems

Power steering hoses can develop leaks

Power steering hoses and components can develop leaks.

Blend Doors in HVAC May Stop Working Due to Bad Vacuum Actuators

One or more blend door vacuum actuators may fail resulting in the incorrect output temperature from the HVAC system. Failed actuators will require replacement to restore proper HVAC operation.

"No start" Caused by Failed Fuel Pump/Relay

The fuel pump and/or fuel pump relay can fail, causing the car to crank over but not start. Proper diagnoses will be necessary to confirm if the pump or relay is at fault.

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1991 Mercedes-Benz 350SD Questions

Hello I am liking to buy a lock pin tool and assembly basket for my 1991 350 SD (1 answer)

I get fuel to the injectors but this car was run on bio fuel and most of the injectors were bad and have been replaced, so I guess the pump needs cleaning too although it is not old, 6 months. best wishes to all.

car cranks great when cold,after warm you have to let set for a hour to crank. (1 answer)

glow plugs working right,turns over fast enough,

i put a/c on then fire started under hood ft driver side by brake fluid cont (1 answer)

it looked like a couple of wires why would the fire start there it was like under the brake fluild jug it was hard to see

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