Mercedes-Benz E420 Car Door Lock Relay Replacement at your home or office.

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Car Door Lock Relay Replacement Service

How much does a Car Door Lock Relay Replacement cost?

On average, the cost for a Mercedes-Benz E420 Car Door Lock Relay Replacement is $136 with $41 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1997 Mercedes-Benz E420V8-4.2LService typeCar Door Lock Relay ReplacementEstimate$196.79Shop/Dealer Price$234.74 - $309.22
1994 Mercedes-Benz E420V8-4.2LService typeCar Door Lock Relay ReplacementEstimate$176.79Shop/Dealer Price$214.77 - $289.27
1995 Mercedes-Benz E420V8-4.2LService typeCar Door Lock Relay ReplacementEstimate$176.79Shop/Dealer Price$214.77 - $289.27
Show example Mercedes-Benz E420 Car Door Lock Relay Replacement prices

What is the Door Lock Relay all about?

Power door locks used to be a luxury feature on vehicles, but they've become so mainstream that nearly every vehicle is now equipped with them. The lock’s function is to make securing your vehicle, as well as passengers, simple and easy. Instead of reaching across the vehicle to lock or unlock the doors, it can be done by simply pressing a button. Pressing the button completes a circuit, enabling the lock actuator to receive power which activates the locking mechanism to the desired position. The circuit is routed through a door lock relay, which acts as a switch to direct the power to actuators on the door locks. When unlock is pressed, the door lock relay switches from a neutral position to activating a pulse of power to the unlock circuits on the actuators. When the lock button is pressed, a pulse of power is switched to the lock circuit of the actuator to lock the doors. When the relay for the door locks is not working properly or sticking, either the lock function, the unlock function, or both are inoperative.

Keep in mind:

  • When service is performed on any electrical system, the battery should be disconnected to prevent accidental damage or injury.
  • If the door lock relay needs to be replaced, it can be indicative of an underlying concern with the power door locks.
  • Some vehicles equipped with remote keyless entry will find the key fob operates the driver’s door lock even while the door lock relay is defective.

How it's done:

  • Test the operation of electric door locks.
  • Test the fuse for that circuit.
  • Test the relay.
  • Replace the faulty relay.
  • Test for proper operation of electric door locks.

Our recommendation:

If you are experiencing problems with your power door locks, have one of our expert technicians diagnose and repair the system. Relays and electrical systems can be complex, and a broken wire or door lock actuator problem can easily mimic the symptoms of a door lock relay and vice versa.

What common symptoms indicate you may need to replace the Door Lock Relay?

  • Power door locks don’t lock when you press the button, while the unlock feature works.
  • Neither the lock nor unlock functions work.

How important is this service?

Power door locks are a convenience feature on your vehicle. If the power locks aren’t working, you can use the key to unlock your door and the locks can be manually operated as well. Have the power door lock system repaired at your convenience.

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Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(24)

Rating Summary
18
2
1
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3
18
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Nicholas

11 years of experience
592 reviews
Nicholas
11 years of experience
Mercedes-Benz E420 V8-4.2L - Thermostat Housing - Raleigh, North Carolina
Great.

Ben

41 years of experience
1441 reviews
Ben
41 years of experience
Mercedes-Benz E420 V8-4.2L - Alternator - Houston, Texas
Fast work. Friendly. Very competent.

James

23 years of experience
99 reviews
James
23 years of experience
Mercedes-Benz E420 V8-4.2L - Steering Rack/Gearbox - Marietta, Georgia
Excellent service. Very knowledgeable and meticulous, ensuring that the work is flawless before he leaves. I highly recommend James.

Joshua

13 years of experience
19 reviews
Joshua
13 years of experience
Mercedes-Benz E420 V8-4.2L - Radiator - Antioch, California
Joshua was a trooper. Pooring down rain and was able to do the job within an hour and a half. very respectful and even got to the appointment 30 minutes early. I HIGHLY recommend Joshua for another job. Thank You and Happy Holidays

Excellent Rating

(24)

Rating Summary
18
2
1
0
3
18
2
1
0
3
Number of Mercedes-Benz E420 services completed
264+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

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