Mercedes-Benz Navigation A1729001304 SLK head unit Repair Service 1year Warranty

This is a professional REPAIR SERVICE for your existing faulty Mercedes-Benz COMAND head unit – not a replacement or a brand-new unit. We specialize in restoring functionality to your vehicle's original multimedia system, saving you the cost of a full replacement. This service includes a 1-Year Warranty on the repair.

Common Mercedes COMAND Head Unit Failures We Repair:

Drivers frequently encounter the following symptoms when this unit begins to fail:

• The system constantly reboots during use or startup.

• COMAND screen stuck on the Mercedes-Benz logo, with no further system boot.

• Failure to power on or completely unresponsive head unit.

• Radio or navigation unit draining the car battery overnight or when parked.

• Unit will not accept reprogramming during diagnostic or software updates.

• Physical buttons not responding or only partially functional.

If you're experiencing one or more of these symptoms, your HU4.5 or HU4.7 navigation unit may be a perfect candidate for our expert repair service.

Commonly Affected Mercedes-Benz Models:

This type of COMAND navigation head unit is commonly found in various Mercedes-Benz models, including:

• Mercedes-Benz SLK-Class (R172 chassis)

• Some C-Class (W204), E-Class (W212), or SLC models

• Other models using the HU4.5 or HU4.7 platform

If you're unsure whether this repair service applies to your specific vehicle or part number, please contact us before placing your order.

Known Part Number:

• A1729001304

Even if your part number is slightly different, this service may still be applicable. Reach out with your part number for verification.

How the Repair Service Works:

1. Purchase this service through our website – no need to send your unit first.

2. You will receive instructions on where to ship your unit to our repair facility located in Maryland.

3. Ship your faulty head unit to us carefully packed and insured.

4. Once received, our skilled technicians will diagnose and repair the internal faults in your unit, replacing damaged components and restoring full functionality.

5. Your repaired head unit will be shipped back to you via tracked shipping.

⚠️ Typical turnaround time is 2–3 weeks from the day we receive your unit. In some cases, depending on the complexity or parts availability, it may take slightly longer – we’ll keep you informed.

Why Choose Module Medics?

Our repair team has extensive experience dealing with Mercedes-Benz COMAND systems and can perform board-level repairs on the HU4.5 and HU4.7 units. These navigation units are complex and interconnected with your vehicle's CAN bus system. Improper repair or replacement can result in additional programming or immobilizer errors. Trust us to do it right — no dealer programming needed in most cases after repair.

Technical Insight:

The HU4.5 / HU4.7 units are prone to eMMC memory failures, DC-DC converter faults, and internal software corruption due to repeated voltage fluctuations or heat cycling. These can cause boot loops, data loss, or complete system failure. We address these issues by testing individual components and replacing only what's necessary, ensuring a high success rate without unnecessary part swaps.

Important:

• This service is not a sale of a replacement unit.

• You must ship your original malfunctioning part to us for repair.

• A one-year limited warranty is included for the work performed.