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MERCEDES-BENZ E-CLASS W211 DOOR CONTROL UNIT FRONT LEFT A2118201585

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Genuine used Mercedes-Benz E-Class W211 / S211 Front Left Door Control Unit, also known as the Front Left Door Control Module (DCM-FL).


Part Number: A2118201585 / 2118201585

Mercedes Designation: N69/1 – Left Front Door Control Unit

Diagnostic Designation: DCM-FL

Position: Front Left Door

Part Type: Door Electronics Control Module / ECU


Compatibility


Commonly fitted to:


* Mercedes-Benz E-Class W211 Saloon

* Mercedes-Benz E-Class S211 Estate

* Approx. 2002–2008

* Petrol and diesel variants


Part number A2118201585 is identified in Mercedes diagnostic data as the DCM-FL – Front Left Door Control Module. (MB World)


Technical Information


The door control module acts as the local electronic controller for the front left door. Rather than every door component being wired directly back to a central ECU, the W211 uses a dedicated door module to process inputs and control electrical consumers within the door.


Functions associated with the module can include:


* Front left electric window operation

* Window motor control and direction

* One-touch / comfort window functions

* Exterior mirror electrical functions

* Mirror heating control

* Central locking / door locking functions

* Processing signals from door-mounted switches

* Communication with other vehicle control units

* Monitoring electrical loads and detecting open-circuit or component faults


Mercedes diagnostic information specifically shows A2118201585 monitoring the left exterior mirror heater circuit; fault code 9211 can be logged if there is an open circuit or defective mirror-heater component. It can also record supply-voltage faults such as 9010 – control unit supply voltage too low. (MB World)


Vehicle Network / Diagnostics


The module is part of the W211’s distributed electronic architecture and communicates with the vehicle’s other control systems.


Diagnostic equipment such as Mercedes STAR / Xentry can access the module as:


DCM-FL – Door Control Module Front Left


Diagnostic checks can include:


* Stored and current fault codes

* Control-module supply voltage

* Door electrical circuit faults

* Mirror circuit faults

* Communication faults

* Actuator and component operation


The module therefore does more than simply operate the window motor; it acts as the electronic interface between the front-left door equipment and the vehicle electrical system. (GlobalParts)


Common Symptoms of a Faulty Door Module


* Front left electric window not working

* Window works intermittently

* One-touch window function unavailable

* Electric mirror adjustment not working

* Heated mirror fault

* Central locking fault on the front left door

* Multiple door functions failing simultaneously

* Electrical functions working intermittently

* Door control module communication fault

* Low-voltage or internal module fault codes


If several unrelated electrical components in the same door stop operating at the same time, the door module, its power supply, earth or wiring loom should be checked.


Important Diagnostic Information


Before replacing the module, it is worth checking:


* Door wiring loom, especially where it passes between the body and door

* Module power and earth supply

* Electrical connectors for corrosion or moisture

* Window motor and regulator

* Mirror wiring

* Door lock actuator

* Associated fuses


A wiring or component fault can sometimes produce a DCM fault code even when the module itself is operational.


Programming / Coding


Replacement door control modules may require coding, adaptation or configuration depending on vehicle equipment and module revision. Some suppliers specifically advise that A2118201585 may require programming after installation. (Module Mechanics)


Important Compatibility Note


Please compare:


* A2118201585 part number

* Front-left installation position

* Electrical connectors

* Hardware / software revision

* Vehicle equipment specification


with the original module before purchasing.


Condition: Genuine used Mercedes-Benz part. May have normal cosmetic marks from previous use and storage. Please check photos for exact condition.


Ideal replacement for a faulty or damaged Mercedes W211/S211 front left door control module.

Brand: Mercedes-Benz

To Control: Engine

Type: Switch Assembly

Mileage: 10

Custom Bundle: No

Manufacturer Part Number: Does Not Apply

Reference OE/OEM Number: Does Not Apply

Placement on Vehicle: Left

Electrical Switch Type: Vehicle

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MERCEDES-BENZ E-CLASS W211 DOOR CONTROL UNIT FRONT LEFT A2118201585

£18.00

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