Repair Mercedes Viano 2004-2008 | TCU 7G-Tronic VGS/NAG2 722.9

The Continental 7G-Tronic (or VGS 722.9 ) seven-speed automatic transmission was fitted to the 2004–2008 Mercedes Viano . Malfunctions of this ECU are common and can result in poor shifting or no shifting at all. When scanning with diagnostic equipment, there can be many different error codes, including: 0717 – The Signal From Component Y3/8N1 (Turbine Speed Sensor, VGS) Is Not Available, 0718 – The Component Y3/8N1 (Turbine Speed Sensor, VGS) Is Defective, 2201 – The Component Y3/8N2 (Internal Speed Sensor) Is Defective. Most problems can be solved by repairing the transmission module.