1999 Mercedes-Benz S420 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Mercedes-Benz S420
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1999 Mercedes-Benz S420 ProblemsTransmission Oil Seals May Leak on High Mileage Vehicles
High mileage vehicles may develop a leak from one or more of the transmission oil seals.
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.
1999 Mercedes-Benz S420 Questionsthere is cable at the back side at the end of the transmission that is leaking ? (1 answer)
had to remove the transmission cross member to get to it
I am trading in my 1999 MB S420 for a new car, but not a new Mercedes. My dash lights just came on and I don't want to trade in the car with the warning lights on. Can I temporarily turn them off? Thank you.