1992 Mercedes-Benz 500SEL Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1992 Mercedes-Benz 500SEL
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1992 Mercedes-Benz 500SEL ProblemsErratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor
A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
A refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.
1992 Mercedes-Benz 500SEL QuestionsRear night lights will not come on when light switch is turned on. (1 answer)
Head light do work when turned on, just the rear light are off
COOLANT MIXING INTO THE OIL-COMPRESSION CHECKS SHOWS NO LEAKS!
I am not sure what happened it went in as it wouldn't go into reverse any more then I get it back & it wouldn't go into Drive or reverse it is a rather expensive repair I paid for the repair & like I said I got it back & the problem got worse should I have to pay for it again ...