Mercedes-Benz S420 Window Motor Regulator Replacement at your home or office.

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Window Motor Regulator Replacement Service

How much does a Window Motor Regulator Replacement cost?

On average, the cost for a Mercedes-Benz S420 Window Motor Regulator Replacement is $332 with $209 for parts and $123 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Passenger Side Front ReplacementEstimate$1703.51Shop/Dealer Price$2113.64 - $3288.91
1997 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Driver Side Rear ReplacementEstimate$616.60Shop/Dealer Price$757.70 - $1098.15
1994 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Passenger Side Front ReplacementEstimate$1675.51Shop/Dealer Price$2085.68 - $3260.98
1997 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Passenger Side Rear ReplacementEstimate$1560.86Shop/Dealer Price$1937.94 - $2986.52
1996 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Driver Side Front ReplacementEstimate$1752.63Shop/Dealer Price$2182.12 - $3415.29
1997 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Passenger Side Front ReplacementEstimate$1675.51Shop/Dealer Price$2085.68 - $3260.98
1998 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Passenger Side Front ReplacementEstimate$1682.51Shop/Dealer Price$2092.35 - $3267.39
1999 Mercedes-Benz S420V8-4.2LService typeWindow Motor / Regulator Assembly - Driver Side Front ReplacementEstimate$1759.63Shop/Dealer Price$2189.66 - $3423.23
Show example Mercedes-Benz S420 Window Motor Regulator Replacement prices

What is the Window Motor/Regulator Assembly all about?

The window regulator typically has over a dozen components that help it move up or down in a very specific fashion throughout the entire raising or lowering of your windows. These components all work together in two unique assemblies: the scissor style window regulator and the cable operated window regulator.

There are scissor-style window regulators that operate like a giant pair of scissors inside your door. They’re usually almost flat when your window is all the way down and in a near perfect X when the window is all the way up. You can look at a scissor style regulator as having several thick pieces of steel that keep the window in place. It’s sturdy, but requires a strong motor that often wears out before everything else.

Cable-operated window regulators use a near vertical cable to help the window get into the right position. It’s a more compact design that puts less stress on the motor. But it is also more susceptible towards breaking due to the increased stress that the pulley and cable must harness to raise and lower your window. In most cases, a cable operated window regulator is composed of one thick piece of metal with a pulley and wire attached to it -- along with a more compact motor.

The electric motor is designed to withstand a certain number of raises and lowerings of your window. While the regulator helps hold the window in place, the motor provides the force needed to make the window stay exactly where you like.

Keep in mind:

  • A window regulator assembly is composed of two components: a motor and a regulator. These components when replaced typically require you to deal with the removal of your door panel, clips, and in certain cases, even the removal of rivets and the specific removal of multiple related components.

  • A window regulator assembly is usually a complicated piece of equipment that can require specialized tools and a lot of patience -- work best left to a professional mechanic.

How it's done:

  • The inside door panel is removed
  • The electrical connection is disconnected and motor removed
  • The window regulator is replaced
  • The window motor is reinstalled
  • The inside door panel is reinstalled and the window is tested

Our recommendation:

If your window is gradually beginning to slow down it’s often better to take care of it while the window can be shut. Once a window regulator stops working completely, it rarely starts working again unless you have other issues that can be identified by a mechanical inspection.

You should have it inspected by a professional mechanic who can test the multiple components that provide the power needed to make the window and regulator assembly work properly.

What common symptoms indicate you may need to replace the Window Motor/Regulator Assembly?

  • If your window is going down ever more slowly, stopping, or needs several presses of the power window button to close, chances are your motor is wearing out.

  • The window regulator assembly can also get off track or completely detach from the window. If you find that the window doesn’t close evenly or hear banging noises inside your door, that assembly may need a closer look.

How important is this service?

A properly operating window motor and regulator allow you, your passengers, and your car's interior to remain dry and safe. Sometimes a window regulator will stop working entirely without the window being fully closed. So of course, getting this service done sooner is better than waiting for an outright failure to occur..

The interiors and power features of your vehicle can also get damaged due to one heavy rainfall that can happen when you least suspect it. So if you’re having issues now, keep you and your car dry by having the issues looked at.

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Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

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Rating Summary
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Tam

22 years of experience
251 reviews
Tam
22 years of experience
Mercedes-Benz S420 V8-4.2L - Fuel Filter - San Francisco, California

Melvin

17 years of experience
221 reviews
Melvin
17 years of experience
Mercedes-Benz S420 V8-4.2L - Trunk does not lock or open - Atlanta, Georgia
I am a independent private driver, and my trunk, passenger doors, engine light, sunroof all began to malfunction at the same time on my s500 Mercedes Melvin came out in the cold and in 30 minutes knew exactly what all the problems were. His knowledge is superb! I will be using Mr Melvin again.

Richard

17 years of experience
141 reviews
Richard
17 years of experience
Mercedes-Benz S420 V8-4.2L - Fan Clutch - Sacramento, California
good guy does the job and easy to talk to very friendly!

Whitney

39 years of experience
783 reviews
Whitney
39 years of experience
Mercedes-Benz S420 V8-4.2L - Fix a Flat Tire (Plug Holes) - Palo Alto, California
It's great.

Excellent Rating

(13)

Rating Summary
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Number of Mercedes-Benz S420 services completed
143+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1000+
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