Mercedes-Benz 420SEL service by top-rated mechanics at the convenience of your home or office

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How much does Mercedes-Benz 420SEL repair and maintenance cost?

The cost depends on your car, the type of service, and where you live. Here are estimates for a selection of Mercedes-Benz 420SEL services.

Service Estimate Savings Dealer Estimate Location
Service type Alternator Repair for 1986 Mercedes-Benz 420SEL V8-4.2L Estimate $412 Savings 48.37% Dealer Estimate $799 Location Denver, CO
Service type Throttle Body Replacement for 1987 Mercedes-Benz 420SEL V8-4.2L Estimate $573 Savings 47.10% Dealer Estimate $1083 Location Denver, CO
Service type Strut Assembly - Front Replacement for 1986 Mercedes-Benz 420SEL V8-4.2L Estimate $279 Savings 44.83% Dealer Estimate $505 Location Denver, CO
Service type Water Pump Replacement for 1990 Mercedes-Benz 420SEL V8-4.2L Estimate $597 Savings 42.59% Dealer Estimate $1041 Location Denver, CO
Service type Crankshaft Position Sensor Replacement for 1989 Mercedes-Benz 420SEL V8-4.2L Estimate $411 Savings 48.36% Dealer Estimate $796 Location Denver, CO
Service type Ignition Coil Replacement for 1986 Mercedes-Benz 420SEL V8-4.2L Estimate $203 Savings 46.57% Dealer Estimate $381 Location Denver, CO
Service type Axle / CV Shaft Assembly - Passenger Side Front Replacement for 1991 Mercedes-Benz 420SEL V8-4.2L Estimate $281 Savings 45.43% Dealer Estimate $515 Location Denver, CO
Service type Drive Belt Tensioner Replacement for 1991 Mercedes-Benz 420SEL V8-4.2L Estimate $351 Savings 43.44% Dealer Estimate $620 Location Portland, OR

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Answers to common Mercedes-Benz 420SEL questions

Q: Car will only start after being jumped - 1991 Mercedes-Benz 420SEL
Answered by David
If this is a fuel issue, it's likely the check-valve in the fuel pressure regulator not holding pressure during shutdown. This valve keeps a low pressure in the fuel injection system for faster starts. If faulty, the fuel pump has...
Q: Car running sluggish then dies - 1988 Mercedes-Benz 420SEL
Answered by Robert
Hello. I would check the fuel filter (https://www.yourmechanic.com/services/fuel-filter-replacement) first. If the filter is clogged then this will occur. If the fuel filter is fine then the air flow meter needs to be checked. This is the most common part to...
Q: No fuel to pumps - 1991 Mercedes-Benz 420SEL
Answered by David
Since you know how to use the multimeter, you are 2 steps ahead already! Start with power to the fuses (fuel pump), then the fuel pump relay to follow the power path. It's also possible that the ignition switch (https://www.yourmechanic.com/services/ignition-switch-replacement),...
Q: Car will not start/no fuel - 1989 Mercedes-Benz 420SEL
Answered by David
If you are certain it is the fuel (i.e. you have confirmed good spark at the plugs), start with power to the fuses (fuel pump), then the fuel pump relay to follow the power path to the fuel pump. It's...

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