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

Mercedes-Benz 300SEL Models:

Image for car images Mercedes Benz 1990 1991 Mercedes Benz 300 SEL size thumb

Mercedes-Benz 300SEL Problems

Electrical & Lights -- Verified

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.

Engine -- Verified

Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can result in severe engine damage.

Heating & Air Conditioning -- Verified

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

Electrical & Lights -- Verified

The instrument cluster, along with the turn signal and wiper combination switch, can fail.

Engine -- Verified

Motor mounts commonly fail, causing engine vibrations to be transferred to the body. Failed motor mounts should be replaced in order to prevent damage to the transmission mount.

Mercedes-Benz 300SEL Questions and Answers

talkback27, 1990 Mercedes-Benz 300SEL, Thonotosassa, FL

I have a 1988 Mercedes Benz 300 SEL the A/C Blows Cold but you can not adjust the temperature in the car if you adjust the temperature the A/C blows hot air and you can not get cold air again until...

gavino, 1990 Mercedes-Benz 300SEL, Antelope, CA

won't start but there is power from the sparkplug. The fuel pump is working but no gas coming from in the injector. There is no power from Bosch K electronic mechanical fuel injection

gavino, 1990 Mercedes-Benz 300SEL, Antelope, CA

i need fuel pump wiring diagram.

joycee, 1990 Mercedes-Benz 300SEL, North Hollywood, CA

hi i just bought my car and they told me that it needed a new water pump if my car make a real loud squick sound when i push down the peedle what does that mean

joycee, 1990 Mercedes-Benz 300SEL, North Hollywood, CA

hi i need help cause im new to mercedes benz cars im wondering where is the fuse box locate at

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