{"product_id":"mercedes-e-class-w211-s211-bi-xenon-headlight-level-control-unit-module-lwr","title":"Mercedes E-Class W211 S211 Bi-Xenon Headlight Level Control Unit Module LWR","description":"\u003cp\u003e#73\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine Mercedes-Benz E-Class W211 S211 Bi-Xenon Headlight Level Control Unit Module LWR A2118203226\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine used Mercedes-Benz Bi-Xenon automatic headlight levelling control unit, designed for selected E-Class W211 Saloon and S211 Estate models equipped with factory Bi-Xenon headlights.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis electronic module forms part of the automatic headlamp range adjustment system (LWR – Leuchtweitenregelung) and helps maintain the correct headlight beam height as vehicle loading and suspension position change.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePart Number: A2118203226\u003c\/p\u003e\u003cp\u003eOE Number: A 211 820 32 26\u003c\/p\u003e\u003cp\u003eAlternative Number Format: 2118203226\u003c\/p\u003e\u003cp\u003ePart Type: Headlight Level Control Unit \/ LWR Module\u003c\/p\u003e\u003cp\u003eSystem: Bi-Xenon Automatic Headlamp Levelling\u003c\/p\u003e\u003cp\u003eApplication: Factory Bi-Xenon Headlights\u003c\/p\u003e\u003cp\u003eVehicle Platform: W211 \/ S211\u003c\/p\u003e\u003cp\u003eManufacturer: Mercedes-Benz\u003c\/p\u003e\u003cp\u003eCondition: Genuine Used OEM Part\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCOMPATIBILITY\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eSuitable for selected Mercedes-Benz E-Class W211 \/ S211 models equipped with the corresponding factory Bi-Xenon \/ automatic headlamp levelling system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMercedes-Benz E-Class W211 Saloon – 2002–2009\u003c\/p\u003e\u003cp\u003e• E200 \/ E200 Kompressor\u003c\/p\u003e\u003cp\u003e• E220 CDI\u003c\/p\u003e\u003cp\u003e• E230\u003c\/p\u003e\u003cp\u003e• E240\u003c\/p\u003e\u003cp\u003e• E270 CDI\u003c\/p\u003e\u003cp\u003e• E280\u003c\/p\u003e\u003cp\u003e• E280 CDI\u003c\/p\u003e\u003cp\u003e• E300\u003c\/p\u003e\u003cp\u003e• E300 BlueTEC\u003c\/p\u003e\u003cp\u003e• E320\u003c\/p\u003e\u003cp\u003e• E320 CDI\u003c\/p\u003e\u003cp\u003e• E350\u003c\/p\u003e\u003cp\u003e• E400 CDI\u003c\/p\u003e\u003cp\u003e• E420 CDI\u003c\/p\u003e\u003cp\u003e• E500\u003c\/p\u003e\u003cp\u003e• E55 AMG\u003c\/p\u003e\u003cp\u003e• E63 AMG\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMercedes-Benz E-Class S211 Estate \/ T-Model – 2003–2009\u003c\/p\u003e\u003cp\u003e• E200 \/ E200 Kompressor\u003c\/p\u003e\u003cp\u003e• E220 CDI\u003c\/p\u003e\u003cp\u003e• E230\u003c\/p\u003e\u003cp\u003e• E240\u003c\/p\u003e\u003cp\u003e• E270 CDI\u003c\/p\u003e\u003cp\u003e• E280\u003c\/p\u003e\u003cp\u003e• E280 CDI\u003c\/p\u003e\u003cp\u003e• E320\u003c\/p\u003e\u003cp\u003e• E320 CDI\u003c\/p\u003e\u003cp\u003e• E350\u003c\/p\u003e\u003cp\u003e• E400 CDI\u003c\/p\u003e\u003cp\u003e• E420 CDI\u003c\/p\u003e\u003cp\u003e• E500\u003c\/p\u003e\u003cp\u003e• E55 AMG\u003c\/p\u003e\u003cp\u003e• E63 AMG\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePetrol and diesel applications are possible because the module is part of the lighting system rather than the engine-management system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eHowever, engine\/model alone does NOT confirm compatibility. Mercedes used different lighting configurations throughout W211\/S211 production, particularly between pre-facelift and facelift vehicles and between standard Xenon\/Bi-Xenon and active\/adaptive lighting systems.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eOnly vehicles equipped with the corresponding factory Xenon\/Bi-Xenon headlamp system should be considered.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eTECHNICAL INFORMATION\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe LWR control unit forms part of the vehicle’s automatic headlamp range adjustment system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAutomatic levelling is particularly important with Xenon\/Bi-Xenon headlights because changes in vehicle loading can alter the angle of the headlight beam.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe system uses information from the vehicle’s level\/suspension sensors to determine vehicle attitude.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe control system can then command the headlamp levelling motors to compensate for changes caused by:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Passenger loading\u003c\/p\u003e\u003cp\u003e• Luggage loading\u003c\/p\u003e\u003cp\u003e• Rear axle loading\u003c\/p\u003e\u003cp\u003e• Suspension movement\u003c\/p\u003e\u003cp\u003e• Vehicle pitch\u003c\/p\u003e\u003cp\u003e• Changes in vehicle ride height\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis helps maintain the intended headlight beam position and reduces the possibility of dazzling approaching traffic.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBI-XENON \/ LWR SYSTEM INFORMATION\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe complete automatic levelling system can include:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• LWR headlamp level control module\u003c\/p\u003e\u003cp\u003e• Front axle level sensor\u003c\/p\u003e\u003cp\u003e• Rear axle level sensor\u003c\/p\u003e\u003cp\u003e• Sensor linkage arms\u003c\/p\u003e\u003cp\u003e• Headlamp levelling motors\u003c\/p\u003e\u003cp\u003e• Left Bi-Xenon headlamp\u003c\/p\u003e\u003cp\u003e• Right Bi-Xenon headlamp\u003c\/p\u003e\u003cp\u003e• Xenon control\/ballast modules\u003c\/p\u003e\u003cp\u003e• Vehicle wiring and connectors\u003c\/p\u003e\u003cp\u003e• CAN communication with other control modules\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMercedes technical information identifies dedicated headlamp range adjustment control, HRA\/LWR power module and axle-level sensor components within the W211 lighting system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCOMMON SYMPTOMS OF A FAULTY LWR MODULE\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Headlights pointing too high\u003c\/p\u003e\u003cp\u003e• Headlights pointing too low\u003c\/p\u003e\u003cp\u003e• Automatic headlight levelling not operating\u003c\/p\u003e\u003cp\u003e• Headlights fail to perform normal adjustment\u003c\/p\u003e\u003cp\u003e• One or both headlights remain in incorrect position\u003c\/p\u003e\u003cp\u003e• Headlamp range control warning\u003c\/p\u003e\u003cp\u003e• Xenon\/Bi-Xenon warning message\u003c\/p\u003e\u003cp\u003e• Headlight levelling fault stored in diagnostics\u003c\/p\u003e\u003cp\u003e• Communication fault with headlamp levelling system\u003c\/p\u003e\u003cp\u003e• Intermittent headlight adjustment\u003c\/p\u003e\u003cp\u003e• Module damaged by moisture or electrical fault\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIMPORTANT DIAGNOSTIC INFORMATION\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eA headlamp levelling fault does not automatically mean that this control module is defective.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBefore replacement, the system should ideally be diagnosed using Mercedes STAR\/Xentry or another suitable diagnostic system.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCheck:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Front axle level sensor\u003c\/p\u003e\u003cp\u003e• Rear axle level sensor\u003c\/p\u003e\u003cp\u003e• Level sensor linkage arms\u003c\/p\u003e\u003cp\u003e• Wiring harness\u003c\/p\u003e\u003cp\u003e• Electrical connectors\u003c\/p\u003e\u003cp\u003e• Module power supply\u003c\/p\u003e\u003cp\u003e• Ground connections\u003c\/p\u003e\u003cp\u003e• Headlight levelling motors\u003c\/p\u003e\u003cp\u003e• Xenon control units\u003c\/p\u003e\u003cp\u003e• Headlamp wiring\u003c\/p\u003e\u003cp\u003e• CAN communication\u003c\/p\u003e\u003cp\u003e• Water\/moisture damage\u003c\/p\u003e\u003cp\u003e• Relevant stored diagnostic trouble codes\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eA broken or seized suspension level-sensor linkage can produce symptoms similar to a defective control module.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eVEHICLE NETWORK \/ DIAGNOSTICS\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe automatic headlamp levelling system communicates with other vehicle electronics to determine the required headlight position.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eDiagnostic equipment can normally be used to:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Read stored fault codes\u003c\/p\u003e\u003cp\u003e• Check sensor values\u003c\/p\u003e\u003cp\u003e• Monitor system operation\u003c\/p\u003e\u003cp\u003e• Test headlamp adjustment\u003c\/p\u003e\u003cp\u003e• Identify communication faults\u003c\/p\u003e\u003cp\u003e• Perform system calibration where required\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis can help distinguish a defective module from a failed sensor, wiring problem or headlamp actuator fault.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eINSTALLATION\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eInstallation should be carried out with the vehicle electrical system safely isolated where required.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBefore fitting, compare the replacement module with the original for:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Mercedes OE number\u003c\/p\u003e\u003cp\u003e• Electrical connector\u003c\/p\u003e\u003cp\u003e• Connector pin configuration\u003c\/p\u003e\u003cp\u003e• Module casing\u003c\/p\u003e\u003cp\u003e• Mounting points\u003c\/p\u003e\u003cp\u003e• Lighting-system specification\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAfter installation, the complete automatic levelling system should be tested.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePROGRAMMING \/ CODING\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eDepending on the vehicle specification and replacement procedure, diagnostic configuration, initialisation or headlamp levelling calibration may be required after installation.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eFor best results, the system should be checked using Mercedes STAR\/Xentry or equivalent diagnostic equipment.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCorrect mechanical headlamp alignment should also be verified after repairs.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIMPORTANT COMPATIBILITY NOTE\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMercedes W211\/S211 vehicles were available with several different headlight systems, including:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Halogen headlights\u003c\/p\u003e\u003cp\u003e• Xenon \/ Bi-Xenon headlights\u003c\/p\u003e\u003cp\u003e• Automatic headlamp levelling\u003c\/p\u003e\u003cp\u003e• Bi-Xenon with integrated curve illumination\u003c\/p\u003e\u003cp\u003e• Different pre-facelift and facelift electronic configurations\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eTherefore, W211\/S211 model compatibility alone is not sufficient.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eBefore ordering, please compare:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePart Number: A2118203226 \/ A 211 820 32 26\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eAlso check:\u003c\/p\u003e\u003cbr\u003e\u003cp\u003e• Headlight type\u003c\/p\u003e\u003cp\u003e• Vehicle equipment\/options\u003c\/p\u003e\u003cp\u003e• Production date\u003c\/p\u003e\u003cp\u003e• Electrical connector\u003c\/p\u003e\u003cp\u003e• Module appearance\u003c\/p\u003e\u003cp\u003e• Existing module number\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eMatching the OE number from your original module is the safest method of confirming compatibility.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eCONDITION\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eGenuine used Mercedes-Benz OEM part.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThe module may show normal cosmetic signs of previous installation, use, storage and removal.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003ePlease inspect the listing photographs carefully to confirm the exact part number, connector and condition of the item supplied.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eIdeal genuine Mercedes-Benz replacement for a faulty Bi-Xenon automatic headlight levelling \/ LWR control module on compatible E-Class W211 and S211 vehicles where OE number A2118203226 matches the original unit.\u003c\/p\u003e\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercedes (Genuine OE)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMileage:\u003c\/strong\u003e 59\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e A2118203226\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReference OE\/OEM Number:\u003c\/strong\u003e A2118203226\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlacement on Vehicle:\u003c\/strong\u003e Rear\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Mercedes (Genuine OE)","offers":[{"title":"Default Title","offer_id":54999219798343,"sku":"158287339249","price":13.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/1528\/3527\/files\/10_290aef51-b409-49c2-aab1-1f6238727c97.jpg?v=1789299111","url":"https:\/\/spares4repairs.store\/products\/mercedes-e-class-w211-s211-bi-xenon-headlight-level-control-unit-module-lwr","provider":"Spares 4 Repairs","version":"1.0","type":"link"}