Is your Mercedes A Class experiencing issues with its CVT (Continuously Variable Transmission) ECU? If you’re encountering problems like the ‘Transmission Visit Workshop’ warning message, loss of power, or stuck gears, you’re not alone. The root cause of these problems often lies within the internal breakdown of the ECU, resulting in fault codes and a compromised driving experience.

Diagnosing the issue can reveal fault codes such as “0722 – The RPM Sensor From Component Y3/9B5 CVT Output RPM Sensor Is Not Available” and “0793 – The RPM Signal From Component Y3/9B4 CVT Secondary RPM Sensor Is Not Available.” This frustrating situation is common in the Mercedes A Class models equipped with the 722.8 transmission.

The Mercedes Main Dealer Solution: Expensive Replacement

Main dealerships often resort to the replacement of the gearbox ECU, valve chest, and solenoids, followed by coding and extensive programming. However, there’s a smarter and more cost-effective way to address this issue – ImmoTools Cyprus’ test and rebuild service.

Our Solution: Efficient Rebuild

At ImmoTools Cyprus, we specialize in testing and rebuilding Mercedes A Class CVT gearbox ECUs affected by the 722.8 transmission problems. Our unique approach involves identifying internal faults using our advanced Hardware-In-the-Loop (HIL) testing rig. During the rebuild stage, our experienced technicians replace faulty components with higher-rated versions to ensure superior performance and longevity.

Affected Vehicles:

Mercedes A-Class A150 / A160 / A170 / A180 / A200
Mercedes B-Class B150 / B160 / B170 / B180 / B200

Common Failure Symptoms:

  • Limp home mode / safe mode
  • Loss of power
  • ‘Transmission visit workshop’ warning message on the dashboard
  • Transmission warning light illuminated
  • Not selecting gears
  • Sticking in gear
  • Output speed sensor fault
  • Speed sensor fault

Common Fault Codes:

  • 0722 – The RPM Sensor From Component Y3/9B5 CVT Output RPM Sensor Is Not Available
  • 0793 – The RPM Signal From Component Y3/9B4 CVT Secondary RPM Sensor Is Not Available
  • 0717 – The RPM Signal From Component Y3/9B5 (CVT Output RPM Sensor) Is Not Available
  • 0730 – The Gear Ratio In The Continuously Variable Automatic Transmission (CVT) Is Not Permissible
  • 1634 – Component Y3/9N1 (CVT Control Unit) Is Defective Or The Voltage Supply Is Faulty

Ready to Get Your CVT Transmission ECU Rebuilt?

For inquiries or further information about our Mercedes A Class CVT transmission ECU repair service, don’t hesitate to contact us. ImmoTools Cyprus is dedicated to providing effective solutions to keep your vehicle running smoothly.