Mercedes-Benz W212 Ignition Lock Switch A2129055600 - Used Original Parts
RM 550
Condition: Used (Original)Description
Product Title
Mercedes-Benz W212 Ignition Lock Switch A2129055600 - Used Original Parts
Diagnosis and Common Symptoms
From a workshop perspective, failure of the W212 Electronic Ignition Switch (EIS), or ignition lock, is a common and definitive no-start condition. The primary symptom is the complete refusal of the vehicle to acknowledge the key. You'll insert the key, and nothing will happen—no dash lights, no radio, and the steering lock will not disengage.
Intermittent faults can precede total failure, such as the key needing to be inserted multiple times before being recognized. On a diagnostic scanner, you will typically find fault codes stored in the EIS module related to internal hardware failure or communication errors with the Electronic Steering Lock (ESL). Look for codes like A25464 ("The electronic steering lock has a malfunction") or A25408 and A25409, which point directly to an internal fault within the ignition switch itself.
Introduction
This is a genuine Mercedes-Benz Electronic Ignition Switch (EIS), a critical component of the Drive Authorization System (DAS). Sourced directly from a donor vehicle, each unit undergoes a rigorous bench test to verify its core functionality and communication protocols before being made available. Opting for a tested, genuine used part provides a cost-effective solution without compromising the integrity of your vehicle's complex security system.
Product Details
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Brand: Mercedes-Benz
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Model Compatibility: W212 (E-Class, approx. 2010-2016)
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Part Name: Electronic Ignition Switch (EIS) / Ignition Lock
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Condition: Genuine Used (Tested Working)
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Notes: This is a theft-relevant part and is not plug-and-play. It requires professional programming (adaptation) to your vehicle's specific keys, Engine Control Unit (ECU), and Electronic Steering Lock (ESL) to function.
Frequently Asked Questions
Q: What symptoms indicate failure? A: The classic symptoms are a total no-crank, no-start condition where the dashboard remains dark when the key is inserted. The steering lock will also fail to disengage, and the key may get stuck or not be recognized at all.
Q: Does this require coding? A: Yes, professional coding is mandatory. The EIS must be programmed to the vehicle's immobilizer system. Failure to properly adapt this module will result in the vehicle remaining immobilized.
Q: Is this original? A: Absolutely. This is a genuine Mercedes-Benz part. We do not deal with aftermarket components for critical systems like the EIS, as only genuine hardware ensures correct and stable communication with other control modules.
Why Choose Us?
- Verified functionality
- Actual photos/videos provided
- 30-day exchange warranty
- Component-level testing to verify CAN bus communication
Shipping
Location: Kuala Lumpur, Malaysia Shipping: West Malaysia RM50 (Estimate) / East Malaysia RM80 (Estimate) Delivery: 1-2 working days Packaging: Secure anti-static packaging, heavy-duty shock absorption. (We send actual photos/videos of the unit and packaging before shipping)
Warranty and Return Policy
- 30-day exchange warranty from the date of receipt.
- Proof of professional installation by a qualified workshop is required for warranty claims.
- No returns if the item is opened, modified, tampered with, or damaged due to incorrect electrical wiring.
- Exchange only for confirmed internal electronic defects.
How to Order
- WhatsApp us to confirm compatibility with your specific VIN.
- Send your chassis number or a clear photo of your old unit label.
- Confirm order details and stock availability.
- Receive actual product photos and diagnostic test confirmation.
- Make payment via bank transfer.
- Item is shipped immediately with tracking details provided.
Contact Us
William – https://wa.me/60102992988 Lok – https://wa.me/60177720143
Price Notice
Price is estimated only. Actual price depends on current stock levels, specific part number revisions, and unit condition. Please WhatsApp us for a formal quote.
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