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

Our certified mechanics come to you · Backed by our 12-month, 12,000-mile warranty · Get fair and transparent estimates upfront

GET A QUOTE Backed by 12-month, 12,000-mile guarantee
Red-stars EXCELLENT RATING ON

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 Dealer Estimate Your Savings Location
Service type Brake Rotor/Disc - Front Replacement for 1990 Mercedes-Benz 420SEL V8-4.2L Estimate $347 Dealer Estimate $619 Savings 43.88% Location Denver, CO
Service type Car Thermostat Replacement for 1989 Mercedes-Benz 420SEL V8-4.2L Estimate $151 Dealer Estimate $267 Savings 43.15% Location Denver, CO
Service type Oil Pan Gasket Replacement for 1988 Mercedes-Benz 420SEL V8-4.2L Estimate $834 Dealer Estimate $1382 Savings 39.65% Location Denver, CO
Service type Axle / CV Shaft Assembly - Passenger Side Front Replacement for 1987 Mercedes-Benz 420SEL V8-4.2L Estimate $280 Dealer Estimate $514 Savings 45.42% Location Denver, CO
Service type Engine Mount - Side Replacement for 1991 Mercedes-Benz 420SEL V8-4.2L Estimate $191 Dealer Estimate $321 Savings 40.23% Location Denver, CO
Service type Ignition Cable (Spark plug wires) Replacement for 1986 Mercedes-Benz 420SEL V8-4.2L Estimate $262 Dealer Estimate $480 Savings 45.37% Location Denver, CO
Service type Ball Joint Front - Lower Left Replacement for 1986 Mercedes-Benz 420SEL V8-4.2L Estimate $231 Dealer Estimate $376 Savings 38.38% Location Portland, OR
Service type Engine Mount - Side Replacement for 1987 Mercedes-Benz 420SEL V8-4.2L Estimate $190 Dealer Estimate $308 Savings 38.26% Location Portland, OR

Fast and easy Mercedes-Benz 420SEL services at your home or office.

Get an instant quote
Backed by 12-month, 12,000-mile guarantee
Abc-logo

“Finding a trusted mechanic at a reasonable price can be extremely difficult. With YourMechanic you can skip the auto shop altogether. They send certified and screened mechanics straight to your door and enable you to save big on car repair and maintenance.”

– ABC NEWS
Inc-logo

“YourMechanic will come to wherever your car is to perform any of a wide variety of car maintenance and repair services, and will charge you less than you'd normally pay if you were to drop your car off at a garage.”

– INC.
Fox-logo

"YourMechanic will fix your car at your garage at a fixed hourly rate much lower than their brick-and-mortar counterparts."

– FOX NEWS

Meet some of our expert Mercedes-Benz 420SEL mechanics

Allen

Allen

260 Reviews; 32 years of experience
Great!
Orlando, FL
May 17
see mechanic profile
Jason

Jason

57 Reviews; 20 years of experience
showed up on time, did a good job!
Oklahoma City, OK
January 19
see mechanic profile
Samuel

Samuel

14 Reviews; 11 years of experience
Alternator started to fail. Samuel showed up early, which was great. He was polite and courteous and fixed the alternator in a very timely manner. I am very pleased with his work and with YourMechanic.
Indianapolis, IN
May 1
see mechanic profile

Fast and easy Mercedes-Benz 420SEL services at your home or office.

Get an instant quote
Backed by 12-month, 12,000-mile guarantee

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: Ignition key not working - 1987 Mercedes-Benz 420SEL
Answered by Robert
It's quite likely the battery is dead, and all electrical functions are inoperative. All of the locks have mechanical actuators. A certified technician from YourMechanic can replace your battery (https://www.yourmechanic.com/services/battery-replacement) at your home or office and get you on your...

Fast and easy Mercedes-Benz 420SEL services at your home or office.

Get an instant quote
Backed by 12-month, 12,000-mile guarantee

Trusted by thousands of happy car owners



A++ Highly recommended! Bryce was very professional, knowledgeable and punctual. He explained to me in detail exactly what he did and showed me the parts he replaced. I will definitely be booking Bryce for my next appointment.



Stephen was very professional and spoke to me in terms that I understood. Although the news about the car was not great, he explained the why's and what it would take to fix it. I will call on him again. Many thanks!



Jason is knowledgable, reliable and friendly person. He took his time to explain things about my car. I highly recommend YourMechanic and Jason's service.

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com