The Mercedes-Benz Universal Steering Lock Emulator (MK12300) is designed as a full electronic replacement for the factory ESL/ELV steering lock found in a wide range of Mercedes vehicles, including W210, W211, W203, Sprinter, Vito, Crafter and more.

Steering lock failure is one of the most common no-start problems in Mercedes-Benz vehicles. When the ESL fails mechanically, the key turns but the vehicle refuses to start. Dealership replacement requires ordering a new steering lock unit and coding it to the vehicle—expensive and time-consuming.

This universal ESL/ELV emulator bypasses the defective steering lock and instantly restores vehicle start authorization. No coding is required — simply connect the emulator and start the engine.

Manufactured by MK3, the module includes high-quality electronics, OEM-style lock sound output, and durable connectors fully compatible with multiple Mercedes-Benz platforms.

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🔧 Features

System Type: Universal Steering Lock Emulator (ESL / ELV)
Fitment: Mercedes-Benz & VW Crafter (multiple chassis listed below)
Manufacturer: MK3
Product Number: MK12300
Operation: Plug & Start – No Programming Required
Lock Sound: Built-in OEM-style lock/unlock sound
LED Indicators:

• Green: READY – Vehicle can start

• Red: POWER – ESL locked / wrong key
  Condition: Brand New
  Weight: 40 g

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⚙️ Technical Overview

The OEM steering lock (ESL/ELV) contains mechanical moving parts that frequently fail with age. When the ESL does not unlock:

• The key turns normally

• The ignition wakes up

• The engine does not start, because the steering lock did not activate

Mercedes-Benz dealerships typically replace the entire steering lock assembly and program it to the vehicle — a costly and slow process.

The MK3 Universal ESL/ELV Emulator electronically replaces the original steering lock, permanently bypassing ESL faults. No programming or adaptation is required.

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🛠️ Installation Instructions

1. Turn off the ignition.

2. Remove the original ESL/ELV connector from the steering lock.

3. Ensure the vehicle is not in locked mode (steering column must be free).

4. Connect the MK3 Emulator to the vehicle harness.

5. Insert the key and start the vehicle — the emulator takes over ESL operation.

LED Behavior:

• Green Light: Correct connection; vehicle ready to start

• Red Light: Wrong key or EIS/EZS mismatch

• No Light: Check power supply and wiring

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🚗 Vehicle Compatibility

Mercedes-Benz (ESL/ELV Models)

Compatible with the following chassis/platforms:

• W210 – 1996–2006

• W208 – 1997–2003

• W211 – 2002–2009

• W639 (Vito/Viano) – 2003–2014

• W906 (Sprinter) – 2006–2018

• W169 (A-Class) – 2004–2012

• W245 (B-Class) – 2005–2011

• W202 – 1997–2006

• W203 – 2001–2006

• W209 (CLK) – 1997–2009

• G-Class (W463) – 1997–2018

• CLS, E, C, CL, SLK, ML series with ESL type steering lock

Volkswagen

• VW Crafter – 2003–2009 (Mercedes-based electronics)