This Intelligent Servo Module (also known as ISM/DSM/ESM) controls the gear selector & park lock functions on Mercedes-Benz vehicles with the 7G-Tronic (722.9) transmission. It is supplied to replace the original unit marked A0002704452.

What this part does

The ISM communicates with the transmission and vehicle CAN to manage gear selection and the park interlock. A faulty ISM can cause “Transmission Visit Workshop”, no-crank in P/N, or inability to shift out of Park. Replacing the module and performing online coding restores correct operation.

Fitment & compatibility

Compatibility is best confirmed by VIN and matching the OE number on your original module. The 722.9 ISM is used across multiple platforms.

Important: Always verify by VIN and the part number on your original unit before ordering.

Programming / Coding

This module requires online programming using Mercedes Xentry with an active account after installation to personalize & activate it to your vehicle.

Interchange / related OE numbers

Common related supersessions seen with Gen-3 722.9 ISM: A0002703252, A0002703352, A0002703452, A0002704452, A0002704652. Check your unit’s label to confirm.

Scope of delivery:

• 1 × ISM / Gear Shift Module – OE number A0002704452