Have a failed or defective Mercedes-Benz W204 or W212 Gateway Module?

Lacorte Automotive offers professional mail-in gateway module cloning for supported 1L15Y and 3M25J variants. Send us your original gateway along with a compatible replacement/donor module, and we'll transfer the applicable vehicle-specific EEPROM and FLASH data to the replacement.

Your replacement module is then bench checked and verified before being shipped back.

Common Gateway Module Failure Symptoms

A failing gateway module may cause symptoms such as:

• Multiple modules suddenly showing communication faults
• CAN bus communication problems
• No communication with certain control modules
• Intermittent electrical problems
• Multiple warning lights appearing simultaneously
• Diagnostic scanner unable to communicate with vehicle systems
• Vehicle network communication faults
• Intermittent no-start or electrical issues
• Water or moisture-damaged module
• Internal electronic failure
• Replacement gateway requires original configuration/data transferred

Proper diagnosis is recommended before ordering. Wiring, battery voltage, CAN bus faults, damaged connectors, or other control modules can cause similar symptoms.

Supported Gateway Variants

This service currently supports:

Mercedes-Benz W204 / W212

• 1L15Y
• 3M25J
• EEPROM data transfer supported
• FLASH data transfer supported as applicable

If you're unsure which version you have, send us a clear picture of your gateway module label before ordering and we'll help verify compatibility.

How It Works

1. Purchase the Service

Place your order through our website.

2. Mail Us Both Modules

Send us:

• Your original gateway module
• Compatible replacement/donor gateway module

3. We Transfer Your Original Data

We transfer the applicable EEPROM, FLASH, configuration, and vehicle-specific data from your original module to the compatible replacement.

4. Tested & Verified

The completed replacement module is bench checked and verified before return.

5. We Ship Everything Back

Your original gateway and completed replacement module are securely shipped back to you.

Fast 1–2 Business Day Turnaround

Electrical/network problems can leave a Mercedes difficult or impossible to properly diagnose and operate.

That's why Lacorte Automotive pushes for a typical 1–2 business day turnaround after receiving your modules.

Our goal is to get your gateway serviced and back on its way as quickly as possible.

What You Need to Send

• Original W204/W212 gateway module
• Compatible replacement/donor gateway module
• Vehicle VIN
• Required ownership documentation

Replacement module is not included with this listing.

Proof of Ownership Required

For vehicle electronic modules containing vehicle-specific configuration or security-related information, proof of vehicle ownership is required before service is performed.

Please provide:

• Government-issued photo ID
• Vehicle title or current registration
• VIN

Documentation must correspond with the vehicle being serviced.

Important — Please Read Before Ordering

This listing is for a mail-in gateway module cloning service only.

Compatibility depends on the exact module part number, processor, hardware version, software version, and vehicle configuration. A module that physically looks identical is not necessarily compatible.

If you're unsure about compatibility, contact us before ordering with:

• Picture of original gateway label
• Picture of replacement gateway label
• Vehicle year/model
• VIN

We'll help verify compatibility before you ship your modules.

Lacorte Automotive
Professional Automotive Electronics • Fast Turnaround • Quality Service

Mercedes-Benz W204 / W212 Gateway Module Cloning

1L15Y & 3M25J • EEPROM / FLASH Data Transfer

Mail-In Service • Typical 1–2 Business Day Turnaround