MERCEDES E CLASS W211 DOOR CONTROL MODULE REAR LEFT SIDE 2002 TO 2006 2118201526

#112

♻ GENUINE MERCEDES-BENZ E-CLASS W211 REAR LEFT DOOR CONTROL MODULE 2118201526 ♻

Genuine used Mercedes-Benz rear left door control module / door ECU, fitted inside the rear left door and responsible for controlling selected electrical functions within that door.

Part Number: 2118201526

Mercedes OE Number: A2118201526

Part Type: Rear Door Control Module / Door ECU / Door Electronics Module

Position: Rear Left

UK Vehicle Side: N/S / Nearside / Passenger Side on RHD vehicles

Vehicle: Mercedes-Benz E-Class W211

Approx. Years: 2002–2006

Manufacturer: Mercedes-Benz

Condition: Genuine used part

Compatibility

Suitable for selected:

* Mercedes-Benz E-Class W211 Saloon – approx. 2002–2006

* Mercedes-Benz E-Class S211 Estate – selected early applications

* Rear left door applications using OE number A2118201526

* Right-hand-drive and left-hand-drive vehicles where the same rear-left door module specification is fitted

Typical W211 model variants from this period may include selected:

* E200

* E220 CDI

* E240

* E270 CDI

* E280

* E320

* E320 CDI

* E350

* E400 CDI

* E500

* E55 AMG

Exact fitment depends on vehicle production date, door equipment and electrical specification.

Technical Information

The rear door control module acts as the local electronic controller for electrical functions within the rear door.

Depending on vehicle equipment, it can communicate with and control components such as:

* Electric window motor

* Central locking actuator

* Door lock status

* Window switch

* Door-open signal

* Interior / courtesy lighting

* Anti-pinch window function

* Convenience closing functions

The module communicates with the vehicle’s central electronics through the onboard network.

Vehicle Network / Diagnostics

The W211 uses networked control modules, so the rear door module can communicate with other vehicle systems through the CAN network.

If the module develops a fault, diagnostic equipment may report:

* No communication with rear door module

* Implausible window position

* Central locking faults

* Door status faults

* Voltage supply faults

* CAN communication errors

A suitable diagnostic tool such as Mercedes STAR / Xentry is recommended when tracing electrical faults.

Common Symptoms of a Faulty Module

A defective rear-left door control module may cause:

* Rear window not operating

* Window operating intermittently

* Rear door not locking or unlocking

* Central locking fault on one door

* Door-open warning behaving incorrectly

* Window switch not responding

* Electrical functions working only intermittently

* Communication fault stored in diagnostics

* Parasitic battery drain in some failure conditions

Important Diagnostic Information

Before replacing the module, also inspect:

* Door wiring loom

* Electrical connectors

* Window motor

* Door lock actuator

* Door switch

* Earth connections

* Power supply and fuses

* Broken wires in the door hinge area

A wiring fault can produce symptoms very similar to a failed control module.

If multiple functions within the same door are faulty, checking power, earth and communication lines is particularly important.

Installation

Typical replacement may involve:

1. Disconnecting the vehicle battery where appropriate.

2. Removing the rear door interior trim.

3. Accessing the door control module.

4. Disconnecting the electrical connectors.

5. Removing the existing module.

6. Installing the replacement unit.

7. Reconnecting all wiring.

8. Refitting the door trim.

9. Testing window and locking operation.

10. Running diagnostics where required.

Care should be taken with older W211 door trim clips and connectors during removal.

Programming / Coding

Coding or adaptation may be required depending on vehicle specification.

A used replacement module may need:

* Variant coding

* Window normalisation / initialization

* Diagnostic fault clearing

* Configuration to match vehicle equipment

Mercedes STAR / Xentry or equivalent diagnostic equipment may be required.

Important Compatibility Note

Before ordering, please compare:

* OE number A2118201526

* Rear left position

* Connector layout

* Number of electrical plugs

* Door equipment specification

* Window motor arrangement

* Central locking specification

* Production date

* Your original module against the listing photographs

* VIN where possible

Do not rely only on “W211 2002–2006”, because Mercedes used several door module revisions across different production dates and equipment levels.

The safest compatibility wording is:

Mercedes-Benz E-Class W211 Rear Left Door Control Module – selected 2002–2006 applications using OE A2118201526.

Condition

Genuine used Mercedes-Benz part.

As a used electronic module, it may show normal signs of previous use including:

* Surface marks

* Light scratches

* Dust

* Minor oxidation around mounting points

* General age-related cosmetic wear

Please inspect all listing photographs carefully for the exact condition, label, connectors and mounting points.

An ideal genuine replacement for a faulty, non-communicating or damaged Mercedes-Benz W211 rear left door control module A2118201526.