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On average, the cost for a Mercedes-Benz S420 Car Door Lock Actuator Replacement is $224 with $70 for parts and $154 for labor. Prices may vary depending on your location.
| Car | Service | Estimate | Shop/Dealer Price |
|---|---|---|---|
| 1998 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Rear Replacement | Estimate$816.02 | Shop/Dealer Price$961.62 - $1372.89 |
| 1999 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Rear Replacement | Estimate$799.80 | Shop/Dealer Price$939.83 - $1346.93 |
| 1997 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Front Replacement | Estimate$403.66 | Shop/Dealer Price$444.74 - $554.79 |
| 1994 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Rear Hatch/Trunk Replacement | Estimate$476.07 | Shop/Dealer Price$558.51 - $797.81 |
| 1995 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Rear Replacement | Estimate$799.80 | Shop/Dealer Price$944.55 - $1355.19 |
| 1994 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Passenger Side Rear Replacement | Estimate$799.80 | Shop/Dealer Price$940.35 - $1347.84 |
| 1995 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Front Replacement | Estimate$403.66 | Shop/Dealer Price$444.78 - $554.87 |
| 1994 Mercedes-Benz S420V8-4.2L | Service typeDoor Lock Actuator - Driver Side Front Replacement | Estimate$403.66 | Shop/Dealer Price$444.73 - $554.78 |
A door lock actuator is the component in electronic door locks that is responsible for locking and unlocking the vehicle’s doors. When a button is pressed to lock or unlock a door, the door lock switch triggers the actuator. A small motor in the actuator then triggers a series of gears. The final gear is connected to a rack and pinion set of gears, which converts the rotational motion of the motor into the vertical motion necessary to lock or unlock the door.
Some modern vehicles have a complete door lock assembly which can’t be separated into individual components. These vehicles will need the entire assembly replaced, rather than just the actuator.
The door lock system shouldn’t be checked unless you notice that something is wrong. As soon as you notice your vehicle behave oddly when you lock or unlock the doors, schedule an inspection.
A door lock actuator is responsible for locking and unlocking your doors. When the door lock switch is triggered, the actuator’s motor powers a set of gears that lock or unlock your door. When the actuator stops working, there is no communication between the door lock switch and the door locks, and you’ll be unable to lock or unlock the door.
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