1986-1991 Mercedes Benz 420SEL Power Window Regulator (without Motor) Rear Pair

Part Details

  • Operation: Power
  • Front / Rear Location: Rear
  • Quantity: Pair
  • Regulator Option: without Motor

This part replaces:

  • Dorman 740-454,740-455

  • New


  • Comes as a PAIR
    • Fits both the LH (Driver Side) & RH (Passenger side) REAR DOORS
  • Replaces dealer part number: 1267300946, 126 730 09 46, 1267301046, 126 730 10 46
  • Scissors style
  • 100% mechanically tested prior to leaving the factory
  • Fits 126 Body Type *
  • Motors are not included
    • Buyer will need to reuse original power window motors

*Please note: To determine your body chassis number or body type of your Mercedes, please see your vehicles chassis & engine data plate. This plate can be located in many different areas depending on which car you have. If you do not know how to find this plate, please consult your owners manual. If you do not have your owners manual, please call your local dealer with the above part number to see if this window regulator will fit your car. This regulator is for the Mercedes Benz 126 body chassis as listed.

Please Note:  These window regulators are designed to work with factory style motors only.  Due to variations in aftermarket designs, replacement motors may not have the correct gear style.

Please Note: We are committed to offering the absolute best value for our customers. If you want a highest quality window regulator at a great price, please see our other "High Quality" window regulator listings. If price is your main concern, we are offering this economy style window regulator as well. It is the same one that most internet sellers are offering. While this window regulator is a good replacement, it is not backed by the same warranty as our high quality regulator.


  • This repair is easier than you may think. You'll find our installation videos helpful. In our experience removing and replacing the door panel is the most involved step in the repair. On most vehicles this only requires removing a few screws and push in clips.
  • You'll get a great feeling of accomplishment after you complete this repair knowing you saved money,and you didn't have to give up your car for a day at the repair shop. Your passengers and other drivers will be amazed.

Fit guaranteed

  • 1A Auto will refund you with no hassle, if this Window regulator does not fit the application stated.
  • You can use your existing hardware and wiring harnesses. This Regulator will install just as your original does. Save time and money.


  • Be confident this part will work right. Every regulator is tested after assembly to make sure all mechanisms are working correctly.
  • It is important that your new regulator works for a long period of time. The design of this regulator is tested to withstand 10,000 cycles. That is enough to raise and lower your window 3 times per day for 9 years.
  • Nothing is more frustrating than taking your car apart and finding the part you purchased does not fit. You want the part to fit. This design is test fit on an actual door. When you install it, you will have no issues.


  • Windows that don't work can be frustrating. They can also hurt your vehicles value. An inoperable window could mean $200-$500 discounted off a dealer trade value or asking price.
  • Some shops and dealers charge more for parts and repairs when they think you don't know what is involved. Now you can get the value you deserve. Knowing what this repair entails can be the difference between the value of doing it yourself, or the pain of a costly repair bill.

2 Year Warranty

This item is backed by a 2 Year Warranty. In the event this item should fail during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

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Vehicle Fit

  • 1981-1985 Mercedes Benz 300SD Power Window Regulator (without Motor) Rear Pair
  • 1986-1987 Mercedes Benz 300SDL Power Window Regulator (without Motor) Rear Pair
  • 1988-1991 Mercedes Benz 300SE Power Window Regulator (without Motor) Rear Pair
  • 1988-1991 Mercedes Benz 300SEL Power Window Regulator (without Motor) Rear Pair
  • 1991 Mercedes Benz 350SD Power Window Regulator (without Motor) Rear Pair
  • 1990-1991 Mercedes Benz 350SDL Power Window Regulator (without Motor) Rear Pair
  • 1984-1985 Mercedes Benz 380SE Power Window Regulator (without Motor) Rear Pair
  • 1981-1983 Mercedes Benz 380SEL Power Window Regulator (without Motor) Rear Pair
  • 1986-1991 Mercedes Benz 420SEL Power Window Regulator (without Motor) Rear Pair
  • 1984-1985 Mercedes Benz 500SEL Power Window Regulator (without Motor) Rear Pair
  • 1986-1991 Mercedes Benz 560SEL Power Window Regulator (without Motor) Rear Pair
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List: $351.00 Save: $257.05
Only 4 left in stock
Part #: 1AWRK00081

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