Experiencing CAN communication faults, multiple warning messages, intermittent electrical problems, or a failed Gateway Module in your Mercedes-Benz?

Lacorte Automotive offers a mail-in remanufactured Gateway Module replacement service for supported Mercedes-Benz W204/W212-family applications using the 1L15Y and 3M25J variants.

Simply mail us your original Gateway Module. We provide a compatible remanufactured replacement, transfer the applicable EEPROM, FLASH, coding/configuration and vehicle-specific data from your original module, bench test the replacement, and ship it back to you.

NO DONOR MODULE REQUIRED — WE PROVIDE THE REPLACEMENT

Every remanufactured replacement supplied with this service includes our 3-Year Warranty.

Applicable Mercedes-Benz Vehicles

This Gateway Module family may be found in various Mercedes-Benz vehicles based on the W204/W212 electrical architecture, including applications such as:

• Mercedes-Benz C-Class (W204)
• Mercedes-Benz C-Class Sedan
• Mercedes-Benz C-Class Coupe (C204)
• Mercedes-Benz C-Class Wagon/Estate (S204)
• Mercedes-Benz E-Class (W212)
• Mercedes-Benz E-Class Sedan
• Mercedes-Benz E-Class Wagon/Estate (S212)

Fitment varies by model year, part number, processor, hardware and software version. Vehicle model alone does not guarantee compatibility.

Please send us a picture of your original module label and VIN if you are unsure about fitment.

Common Gateway Module Failure Symptoms

The Gateway Module serves as an important communication point between multiple vehicle networks. A defective gateway can therefore create problems that appear to involve several unrelated systems.

Common symptoms can include:

• Multiple warning lights appearing at the same time
• Multiple control module communication DTCs
• CAN bus communication faults
• Diagnostic scanner unable to communicate with certain modules
• Diagnostic scanner unable to perform a complete vehicle scan
• Modules intermittently appearing offline
• Intermittent electrical problems
• Instrument cluster warning messages
• Starting or intermittent no-start complaints
• Ignition/electrical systems behaving intermittently
• Battery drain or modules remaining awake
• Vehicle systems failing to enter sleep mode correctly
• Loss of communication between different CAN networks
• Various accessories or vehicle functions becoming unavailable
• Numerous seemingly unrelated fault codes
• Gateway completely offline
• Water or moisture-damaged gateway
• Internal processor or memory failure

A failed Gateway can sometimes make the vehicle appear to have multiple bad control modules when the underlying problem is actually network communication through the Gateway.

Proper diagnosis is strongly recommended before ordering. Low battery voltage, wiring damage, corrosion, CAN bus faults, poor grounds, damaged connectors, or another defective control module can produce similar symptoms.

Supported Gateway Variants

This service currently supports:

Mercedes-Benz W204 / W212

1L15Y

3M25J

Depending on the module, our service can include transfer of the applicable:

• EEPROM data
• FLASH data
• Original vehicle configuration
• Module-specific information required for the replacement

How It Works

1. Purchase the Service

Place your order through our website.

2. Mail Us Your Original Gateway

Remove and securely ship us your original Gateway Module.

You do not need to purchase or send us a donor module.

3. We Provide the Replacement

Lacorte Automotive supplies an appropriate remanufactured Gateway Module compatible with your original unit.

4. We Transfer Your Original Data

Applicable EEPROM, FLASH and vehicle-specific configuration data is transferred from your original module to the replacement.

5. Tested & Verified

The replacement module is bench checked and verified before leaving our facility.

6. We Ship It Back

Your completed remanufactured Gateway Module is securely packaged and shipped back to you for installation.

Typical 1–2 Business Day Turnaround

We understand that network communication problems can leave a Mercedes-Benz difficult to diagnose or completely unusable.

That's why Lacorte Automotive pushes for a typical 1–2 business day turnaround after we receive your original module, subject to the condition of the original and replacement availability.

Our goal is to get the replacement completed and back on its way to you as quickly as possible.

3-Year Warranty Included

Your remanufactured replacement Gateway Module is backed by our 3-Year Warranty against defects in the supplied remanufactured module and our workmanship, subject to our applicable warranty terms.

We stand behind the electronics we supply and the work we perform.

What's Included

• Compatible remanufactured Gateway Module
• Applicable EEPROM data transfer
• Applicable FLASH data transfer
• Transfer of applicable original vehicle configuration
• Professional bench programming
• Testing and verification
• 3-Year Warranty
• Typical 1–2 business day turnaround after receipt

YOU SEND:

Your original Gateway Module

WE PROVIDE:

The compatible remanufactured replacement module

YOU RECEIVE:

A programmed, tested replacement Gateway Module backed by our 3-Year Warranty

Proof of Ownership Required

Because automotive control modules may contain vehicle-specific configuration and security-related information, proof of vehicle ownership is required before service is performed.

Please provide:

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

Documentation must correspond with the vehicle being serviced.

Important — Please Read Before Ordering

This is a mail-in remanufactured replacement service.

Compatibility depends on your exact Gateway part number, processor, hardware version, software version and vehicle configuration.

If the required information cannot be recovered from your original module because of severe physical, electrical or memory damage, additional programming or vehicle-side work may be required. We will contact you if the normal service cannot be completed.

Not Sure If Yours Is Compatible?

Send us:

• Clear photo of the original module label
• Vehicle year
• Vehicle model
• VIN

We'll help verify compatibility before you send your module.

Lacorte Automotive
Professional Automotive Electronics • Fast Turnaround • Quality Remanufactured Modules

Mercedes-Benz W204 / W212 Gateway Module Replacement

1L15Y & 3M25J • Remanufactured • Programmed • Tested

You Send Your Original • We Provide the Replacement • 3-Year Warranty • Typical 1–2 Business Day Turnaround