Mercedes-Benz Full System Scan Tool, 722.9 TCM Adaptation

Most generic code readers stop at the powertrain module on a Mercedes. That is the problem when you are chasing a transmission fault: the 722.6 five-speed and the 722.9 seven-speed keep their fault memory in the transmission control module, and a basic OBDII reader will show you a clean scan while the car is still limping in second gear. The OBDMATE OM807 talks to every module on Mercedes-Benz vehicles from 2000 through 2021 over the standard 12V 16-pin DLC, so engine, transmission, ABS and SRS all come back with their own stored and pending codes, live data and freeze frame.

The reason it earns bench space in a transmission shop is the reset list. Alongside oil reset, throttle adaption, EPB retract, battery registration, ABS bleeding, steering angle reset, TPMS and EGR adaptive, OBDMATE lists TCM adaptation among the service functions. That is the procedure you need after a conductor plate, valve body or shift solenoid job on a 722.6 or 722.9, when the module is still holding the old clutch fill values and the car shifts hard until the adaptations are cleared and relearned. On the diesels it also covers DPF regeneration, AdBlue reset, fuel pump AdBlue reset and pressure sensor and pressure valve replacement. OBDMATE notes that which functions are available depends on the specific year, make and model, so confirm your chassis before you count on any one reset.

Outside the Mercedes coverage it works as a plain OBDII scanner on any 1996-and-newer car with an OBDII port: read and erase codes, kill the check engine light, live data and graphing, freeze frame, I/M readiness, O2 sensor and on-board monitor tests, vehicle information and a battery voltage test. It is a corded handheld with a 2.8-inch color screen and automatic VIN recognition, not a tablet you have to keep charged. Software updates are free for the life of the tool over WiFi or USB, on Windows or Mac, with no subscription, and it ships with a one-year warranty. Menus run in English, French, German, Italian, Spanish, Portuguese and Czech.