TCU Gearbox A0044460310 / 0044460310 ISM – Mercedes-Benz
TCU Transmission Gearbox Controller ISM with part numbers A0044460310 and 0044460310 is a gearbox control unit used in Mercedes-Benz vehicles equipped with automated transmissions featuring the ISM (Intelligent Servo Module) system.
This controller is responsible for precise gearbox operation, control of gear-shift actuators, communication with other vehicle modules (ECU, ABS, ESP), and correct operation of driving modes. It is a key component of the drivetrain system — without it, the vehicle will not shift gears correctly or operate in automatic mode.
The A0044460310 / 0044460310 module is used in selected Mercedes-Benz models with diesel and petrol engines, depending on body version and transmission configuration. It is most commonly found in commercial vehicles and selected passenger cars with automated gearboxes, produced approximately between 2008–2016.
Important technical information: this controller cannot be prepared in VIRGIN version. This means it is not possible to erase its data and adapt it like a brand-new module.
The only correct way to use this controller is via the CLONE service, which involves full cloning of data from the original ISM gearbox controller. This process consists of reading the original data (gearbox configuration, vehicle data, synchronization with other modules) and transferring it to the replacement controller.
After successful cloning, the controller operates in the vehicle exactly like the original — without the need for additional programming, coding, or diagnostic adaptation.
This solution is recommended in cases of electronic controller failure, internal errors, loss of communication with the gearbox, or gear selection problems, while maintaining full compatibility with the vehicle’s factory configuration.
Q&A – A0044460310 / 0044460310 TCU ISM Mercedes-Benz
Can the A0044460310 controller be prepared in VIRGIN version?
No. This ISM gearbox controller does not support VIRGIN mode and cannot be cleared for adaptation like a new module.
How can the controller be used in another vehicle?
The only option is to clone the data from the original ISM controller and transfer it to the replacement unit.
What exactly does CLONE involve?
CLONE involves reading the complete data from the original gearbox controller and writing it to the new module, preserving the vehicle’s original configuration.
Is additional programming required after cloning?
No. After proper cloning, the controller is ready for installation and works without any further adaptations.
What symptoms may indicate ISM controller failure?
Typical symptoms include no gear changes, gearbox limp mode, gearbox error messages, loss of diagnostic communication, or inability to move the vehicle.
Can the controller be installed without cloning the data?
No. Installing the controller without cloning data from the original module will prevent the gearbox from operating correctly.
