Mercedes-Benz W211 W203 W219 Alarm Module A2118209126 - Used Original Parts
RM 350
Condition: Used (Original)Description
Product Title
Mercedes-Benz W211 W203 W219 Alarm Module A2118209126 - Used Original Parts
Diagnosis and Common Symptoms
From the workshop floor, the A2118209126 Anti-Theft Alarm (ATA) siren is a frequent culprit for electrical gremlins. The primary failure point is the internal, non-serviceable NiMH batteries, which leak or fail over time. This leads to a cascade of issues, most notably a significant parasitic draw as the vehicle's electrical system fruitlessly attempts to charge the defective internal battery.
Common symptoms include the alarm sounding randomly without cause, particularly during temperature changes overnight. Conversely, you may experience a complete lack of audible sound when the alarm is intentionally triggered. On the instrument cluster, you may see an "ATA System Service Required" warning. A technician using STAR/XENTRY diagnostic tools will often find fault codes pointing to the "Alarm Signal Siren (H3/1)" having an internal fault or communication error with the rear SAM (Signal Acquisition Module).
Introduction
This is a Genuine Mercedes-Benz replacement Alarm Siren Module for vehicles experiencing the issues outlined above. Sourced directly from donor vehicles, this unit is not an aftermarket copy, ensuring seamless integration with your car's complex CAN bus system. Each module undergoes a rigorous bench test by our technicians to confirm the siren's acoustic output and, crucially, the stability of its internal battery circuit. This is a reliable, workshop-verified solution to restore your vehicle's security system to full operational status.
Product Details
- Brand: Mercedes-Benz
- Model Compatibility: W211 E-Class (2003-2009), W203 C-Class (2001-2007), W219 CLS-Class (2004-2010)
- Part Name: ATA Alarm Siren Module
- Condition: Genuine Used (Tested Working)
- Notes: Internal battery pack has been load-tested to confirm it holds a charge, preventing parasitic drain. Siren function and signal communication verified.
Frequently Asked Questions
Q: What symptoms indicate failure? A: The most common indicators are random alarm activation, no sound from the siren when triggered, a persistent "ATA Service" error on the dashboard, and a vehicle battery that drains overnight.
Q: Does this require coding? A: No. For the specified W211, W203, and W219 platforms, this is a direct plug-and-play component. The vehicle's control units will recognize the module upon connection without the need for SCN coding.
Q: Is this original? A: Yes, this is a Genuine Mercedes-Benz part, meticulously removed and tested. We only supply authentic components to guarantee correct fitment and electronic compatibility.
Why Choose Us?
- Verified functionality
- Actual photos/videos provided
- 30-day exchange warranty
- Component-level testing ensures the internal battery is not compromised, preventing future parasitic drain issues.
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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