Mercedes-Benz W212 Electronic Steering Lock Module A 212 900 66 12 - Used Original Parts

Here is the creative top half for the product listing, written from the perspective of a Senior BMW Technician.

Diagnosis and Common Symptoms

From the workshop floor, the call for a W212 no-start is a familiar one. The primary suspect is often this Electronic Steering Lock (ESL/ELV) module. The classic symptom is a complete no-crank, no-start condition where the driver inserts the key, and nothing happens beyond the dashboard lights illuminating. You will not hear the characteristic "whirring" or "clicking" sound of the steering lock disengaging from the column.

On your diagnostic scanner, you'll typically find Diagnostic Trouble Codes (DTCs) pointing to a fault within the Drive Authorization System (DAS) or a direct communication failure with the N26/5 ESL control module. A dashboard warning displaying a red steering wheel and key symbol is the final confirmation of a critical internal failure within this unit.

Introduction

A failed ESL module can immobilize your E-Class, but the repair doesn't have to involve the high cost of a new unit from the dealer. We offer a cost-effective and reliable solution: a Genuine Mercedes-Benz ESL, carefully removed from a donor vehicle. Each module undergoes a rigorous bench-testing procedure to confirm full mechanical and electronic functionality before it is approved for sale. This is the professional-grade repair component you need to get your client's vehicle back on the road.

Product Details

• Brand: Mercedes-Benz

• Model Compatibility: W212 Chassis (E-Class, E350, E550, etc.)

• Part Name: Electronic Steering Lock (ESL/ELV) Module

• Condition: Genuine Used (Tested Working)

• Notes: This unit is a critical security component. It must be programmed and synchronized to the vehicle's Electronic Ignition Switch (EIS) by a qualified technician with appropriate diagnostic equipment. Verify part number A 212 900 66 12 matches your original unit for direct compatibility.