Bosch M3.4.2 (Mercedes) – Immo Off with Julie™ PRO

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22 October 2026

Immo off with Julie™ Emulator for Mercedes C-Class W202 with Bosch M3.4.2 ECU. A proven Julie™ PRO solution, now with a quick video.

Mercedes C-Class W202 on the lift, Bosch M3.4.2 inside. Julie™ PRO takes care of the immo off.

This is a proven solution that is already in our offer. The C-Class W202 is a popular car, and the Bosch M3.4.2 is one of the ECUs we support with Julie™ PRO. We have just added a quick video with the procedure.

The job

A W202 with an immobilizer problem will not start, and your customer wants the car back. You need a solution that works on the first try.

The solution

Julie™ PRO connects to the ECU and replaces the immobilizer signal, so the engine starts without the original immobilizer system. Every emulator comes with a step-by-step manual.

Quick video

The video shows the main steps of the installation. For the full procedure, always use the manual, since we update it regularly.

Open the installation manual

Why choose Julie™ for Bosch M3.4.2

Tested solution, developed and checked in our laboratory in Poland.
Step-by-step manual with every emulator.
ECU not on the list? Send the ECU file and photos in a free ticket. Our technical team will check it.
Made by a team with 20+ years of experience, trusted by thousands of workshops worldwide.