ISM Automatic Transmission Control Module A1644460710 Mercedes ML W164 R W251 VIRGIN
The ISM transmission control module with part numbers A1644460710 and 1644460710 is used in Mercedes-Benz vehicles equipped with the 7G-Tronic 722.9 automatic transmission. This unit has been fully tested, covered by warranty, and prepared as a VIRGIN version for programming and installation in another vehicle.
A faulty ISM module may cause the engine not to start, the transmission remaining locked in Park (P), missing gear position indication on the instrument cluster, transmission limp mode, CAN communication faults, and transmission malfunction warnings. Failure of the A1644460710 transmission control module often makes the vehicle unusable even when the transmission itself is mechanically sound.
Which vehicles use A1644460710?
The ISM transmission control module A1644460710 / 1644460710 was installed in Mercedes ML W164 and Mercedes R-Class W251 models equipped with the 7G-Tronic 722.9 automatic gearbox.
Commonly found in vehicles powered by the 3.0 CDI OM642, 4.0 CDI OM629, 5.0 V8 M113 and 5.5 V8 M273 engines.
The most important compatibility criterion is matching the original part number A1644460710 or 1644460710.
Always verify compatibility using the part number printed on the original ISM module installed in the vehicle. Matching the original reference number remains the safest and most reliable method of selection.
VIRGIN Version
This module has been prepared as a VIRGIN unit, meaning all data from the previous vehicle has been removed. After installation, the module must be programmed and assigned to the vehicle using Mercedes Star Diagnosis or Xentry. During the procedure, the transmission configuration and vehicle-specific data are written to the ISM module.
Common Symptoms of a Faulty Mercedes ISM Module
- Engine will not start.
- Transmission remains locked in Park (P).
- No P-R-N-D indication on the instrument cluster.
- 7G-Tronic transmission enters limp mode.
- CAN communication faults related to the ISM module.
- Transmission malfunction warning messages.
- No response when shifting the selector lever.
FAQ
Does the A1644460710 transmission control module fit the Mercedes ML320 CDI W164 3.0 OM642?
Yes. The A1644460710 ISM module was used in Mercedes ML320 CDI W164 models equipped with the 3.0 V6 OM642 engine and the 7G-Tronic automatic transmission. Compatibility should always be confirmed by matching the part number.
How do I program the 1644460710 ISM module in a Mercedes R350 CDI W251?
After installation, the module must be programmed using Mercedes Star Diagnosis or Xentry. A VIRGIN ISM module requires vehicle assignment and configuration before the vehicle can operate correctly.
What are the symptoms of a faulty A1644460710 ISM module in a Mercedes ML350 CDI?
The most common symptoms include a no-start condition, inability to change gear selector positions, communication faults, and the transmission entering emergency operating mode.
Is part number 1644460710 compatible with the Mercedes 7G-Tronic 722.9 transmission?
Yes. The ISM module with part number 1644460710 is designed to operate with the Mercedes-Benz 7G-Tronic 722.9 automatic transmission used in ML W164 and R W251 models.
Mercedes R320 CDI OM642 – does A1644460710 require coding after replacement?
Yes. A VIRGIN module must be programmed and configured using Star Diagnosis or Xentry so that vehicle-specific data can be stored and the module can communicate correctly with the transmission system.