722.8 CVT Transmission Control Module for Mercedes-Benz

This control-module product is for Mercedes-Benz 722.8 CVT applications. The complete controller number and original transmission identification define the replacement enquiry.

Supply the module label and vehicle details, together with the workshop's programming requirements. Compare the controller generation and connector layout before ordering.

Send the original module label, vehicle VIN, transmission code and required quantity. Include the workshop’s coding or programming requirements in the enquiry.

Contact TOSEN for a quotation or browse Transmission Control Units.

The 722.8 transmission control module is the electronic control unit for the Mercedes-Benz 722.8 continuously variable transmission. It processes the gearbox sensor signals, including input and output shaft speed, selector position and variator pressure, and then commands the hydraulic control unit that sets the variator ratio and applies the forward and reverse clutch. Because the 722.8 is a CVT, ratio changes are continuous rather than stepped, so the module output regulates variator clamping pressure instead of selecting discrete gears. The module carries the control software and adaptation data for the transmission, and it is specified by the complete controller number and the original transmission identification rather than by vehicle model alone.

• Component: Transmission control module (TCU) for the 722.8 CVT
• Transmission family: 722.8
• Transmission type: continuously variable (CVT)
• Vehicle application: Mercedes-Benz
• Role in the system: reads transmission sensor data and controls the hydraulic unit that sets ratio and clutch engagement

The 722.8 transmission control module is specified for Mercedes-Benz vehicles running the 722.8 continuously variable transmission, a unit fitted to compact front-wheel-drive models across a range of production years. Because the same transmission family was used in several model and model-year combinations, and the control hardware was revised over that run, the reliable way to confirm fitment is to match the complete controller number stamped on the original module rather than to order by vehicle model. The controller generation, the electrical connector layout and the transmission identification should all be compared against the removed unit, and the workshop’s programming or adaptation requirements should be established before the replacement is ordered.

• Transmission family to match: 722.8
• Transmission type to match: continuously variable (CVT)
• Primary check: the complete controller number on the original module label
• Secondary checks: controller generation, connector layout and transmission identification against your original unit
• Workshop planning: include the vehicle VIN and any coding or programming requirement in the enquiry

The 722.8 transmission control module is supplied as a new component. TOSEN sources CVT electronics through a factory-direct supply channel and checks units against the controller number and connector arrangement described on this page before dispatch. The module is covered by the 6 months warranty stated in the specification table above. Distributors and repair workshops can request a sample unit so that the controller generation is confirmed against the original before a larger order is placed.

What vehicles use the 722.8 transmission control module?

The 722.8 transmission control module is used in Mercedes-Benz vehicles fitted with the 722.8 continuously variable transmission. Because that transmission was fitted to more than one model and model year, you should confirm compatibility by matching the complete controller number on your original module rather than by the vehicle model name alone before ordering a replacement.

How is the 722.8 different from a stepped automatic transmission?

The 722.8 is a continuously variable transmission, so it varies its ratio steplessly rather than shifting through fixed gear steps. Its control module therefore regulates variator clamping pressure continuously instead of commanding discrete gear changes, which is why the controller must carry software matched to the CVT and the specific vehicle configuration rather than a conventional stepped-shift program.

Does a replacement 722.8 control module need coding?

A replacement transmission control module for the 722.8 CVT generally requires coding or adaptation to the vehicle after installation, because the module carries control software and adaptation data that must correspond to the transmission and vehicle configuration. Send TOSEN the original module label, the vehicle VIN and your workshop’s programming requirements so that the scope of the installation is clear before the module is dispatched.

How do I confirm the correct 722.8 controller before ordering?

Read the controller number on the original transmission control module and confirm it matches the 722.8 specification. Then compare the connector layout, the controller generation and the transmission identification against the removed unit, and supply TOSEN with the module label and vehicle details so that the part can be verified before you commit to the order.