Mercedes Benz W212 Keyless Entry Antenna Module A2128200989 – Original Used Part
RM 550
Condition: Used (Original)At a Glance
- Mercedes Benz W212 Keyless Entry Antenna Module A2128200989 – Original Used Part
- Part number: A2128200989
- Fits: Mercedes Benz W212 E-Class · confirm by chassis number before ordering
- Used Original · tested working
- RM 550 · final quote via WhatsApp
- M.S. Motor · Kuala Lumpur, Malaysia · ready stock
Diagnosis and Common Symptoms
When the A2128200989 module fails, the communication bridge between the vehicle's Keyless-Go system and the smart key is severed. Diagnostic scans typically reveal fault codes such as B1A5B11 (Keyless Go antenna circuit short to ground) or B1A5B13 (Antenna open circuit). On the dashboard, you will frequently encounter the "Key Not Detected" warning, even if the key is inside the cabin. Physical symptoms include the failure of the door handle proximity sensors to lock or unlock the vehicle and the push-to-start button requiring multiple presses or failing entirely until the key is physically inserted into the ignition.
Introduction
This Mercedes Benz W212 Keyless Entry Antenna Module is a Genuine used part harvested from a donor vehicle with confirmed electronic integrity. Every module has undergone a rigorous bench test and signal verification to ensure it meets factory range specifications. Choosing a Genuine used component ensures full compatibility with the W212 CAN-bus architecture without the signal interference issues often found in aftermarket alternatives. This part is ready for immediate installation to restore your vehicle's convenience features to factory standards.
Product Details
- Brand: Mercedes Benz
- Model Compatibility: W212 E-Class
- Part Name: Keyless Entry Antenna Module
- Part Number: A2128200989
- Condition: Genuine Used (Tested Working)
- Notes: Before installation, please inspect your existing wiring harness for signs of moisture ingress, as this is a common cause for antenna failure in the E-Class chassis.
Frequently Asked Questions
What symptoms indicate failure?
The most common signs are the "Key Not Detected" message, the inability to use the push-to-start feature, and the failure of the exterior door handles to respond to touch.
Does this require coding?
This module generally operates as a plug-and-play component. It acts as an antenna receiver and typically does not require SCN coding or VIN-locking to function within the Keyless-Go circuit.
Is this original?
Yes, this is a Genuine Mercedes Benz factory component. We exclusively provide original hardware to ensure the frequency range and signal strength remain consistent with the manufacturer's design.
Part price does not include installation. Our workshop can install for you, labour is charged separately and confirmed with you before any work starts.
We cannot diagnose your car over WhatsApp or photos. Not sure this part will solve your problem? Come for a workshop check, diagnosis fee RM180. If you proceed with the repair using our parts, the RM180 is offset into the labour charge. If you decide not to repair, only the RM180 applies.
All parts are tested and guaranteed to work. Whether a part solves your car's problem can only be confirmed by diagnosis.
Shipping: from Kuala Lumpur, West Malaysia ~RM50, East Malaysia ~RM80 (estimate, confirm via WhatsApp). Delivery 1-2 working days in secure anti-static packaging.
Warranty: 30-day exchange for control units, engines, gearboxes and other major parts; 14 days for small parts. Claims require proof of installation by a qualified workshop. No warranty for items opened, modified, or damaged by wrong installation.
Prices vary with stock and part condition. Final price via WhatsApp.
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