Cardone
Window Regulator

Cardone 82-3902M Window Regulator - Rear Left

Brand Cardone 82-3902M
Position Rear Left
E-Waste No
Installation Instructions Included Yes
Material Metal; Plastic
Motor Included No
Mounting Hardware Included No
Package Contents Window Lift Regulator; Instruction Sheet
Product Condition New
Window Operation Type Manual
Product line Window Regulator
Fits Mercedes-Benz · 4 vehicles

100% new unit. Provides reliable window lift operation.

Guaranteed fit, form and function. A direct replacement window regulator.

O.E.M. design flaws corrected. Built for long lasting performance.

Cross-references Mercedes-Benz 1237302746 for the same application. See all 1.

$44.30Free shipping
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Step 2 — Quantity
Order total $44.30
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Free returns within 60 days if it doesn't fit when fitment is verified.

Cardone 82-3902M Window Regulator for Mercedes-Benz

Cardone 82-3902M is a new rear left window regulator built for manual window systems in select Mercedes-Benz 300D models. It is engineered to restore smooth window lift operation while reducing strain on the window lift motor by correcting common original design weaknesses.

For owners searching for a Mercedes-Benz 300D rear left window regulator, this Cardone Window Regulator line focuses on fit, function, and long-term reliability. The 82-3902M is a stand-alone regulator solution for manual applications and is designed to meet or exceed OEM performance expectations.

Key Features

  • 100% new construction for dependable window movement
  • Guaranteed fit, form, and function for the listed application
  • Meets or exceeds OEM performance standards
  • Original design flaws are corrected for lasting operation
  • Stand-alone regulator design for a cost-efficient repair
  • Metal and plastic construction
  • Installation instructions included
  • Rear left mounting position

Product Details

The Cardone Window Regulator product line is built to deliver direct-replacement value for body and door repairs. Part number 82-3902M is designed for 1978-1981 Mercedes-Benz 300D models with manual window systems, rear left position. It cross-references Mercedes-Benz 1237302746 for the same application. By replacing a worn or failed regulator, the window lift motor is relieved from excess load, which helps maintain proper operation in the door assembly.

What This Part Helps Fix

  • Slow or uneven rear left window movement
  • Window that will not raise or lower correctly
  • Excess strain on the window lift motor
  • Noise or binding from a worn regulator mechanism
  • Failure caused by original regulator design weakness

Installation Notes

Fits 1978-1981 Mercedes-Benz 300D, rear left. Confirm manual window operation before ordering and match the rear left door location to the vehicle being serviced. Installation instructions are included, and the regulator is supplied without a motor or mounting hardware.

Quality Assurance

Cardone engineers use updated design corrections and modern manufacturing methods to produce a new regulator that aligns with OEM-style fit and performance targets. The 82-3902M is built to provide reliable operation in the listed Mercedes-Benz 300D applications.

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1981Mercedes-Benz300DRear LeftCompatible with manual window systems in vehicles.; Window Regulator
1980Mercedes-Benz300DRear LeftCompatible with manual window systems in vehicles.; Window Regulator
1979Mercedes-Benz300DRear LeftCompatible with manual window systems in vehicles.; Window Regulator
1978Mercedes-Benz300DRear LeftCompatible with manual window systems in vehicles.; Window Regulator
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Mercedes-Benz — 1237302746