Mercedes-Benz S420 Repair and Maintenance Costs
A guide to repairs, service, and maintenance costs for your Mercedes-Benz S420
The national average repair and maintenance cost for a Mercedes-Benz S420 is between $782 and $955 per year. Repair and maintenance costs vary depending on age, mileage, location and service provider.
Repair Cost Index Score
Mercedes-Benz S420scores in the middle range of all car models for average repair and maintenance costs
- average of all models
What does this score mean?
Annual Repair Cost
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 engi...
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.
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.
Need to take out radio for repair
The driver side light stays on even if the car is off
Replaced the resister. Blower continues to run w.hen car is off. Have to unplug resister to shu...
Overall Score (7 Reviews)
June 30, 2013
1994 Mercedes-Benz S420
the heater valve blowing warm air out of the vents and air condition works off and on. I was told if I by pass the heater valve Ill have good air condition but no heat until I replace the heater va...
June 09, 2013
what cause my S420 Mercedes to lose power when accelerate from stop it sound like the plug missing fire it does it after driven a few miles stopping to a stop it get worse as I go along and stop at...
December 01, 2012
heater dont work and shifter dont work it go in different spot drive is revers 3 is drive. what can i do.