What is the fault when a Volkswagen dual-clutch transmission engages but the car doesn't move?

[RachelLynn]

When a Volkswagen dual-clutch transmission engages but the car doesn't move, it may be due to a fault in the mechatronic unit or clutch failure. The advantages of dual-clutch transmissions are: Due to more direct gear shifting and reduced power loss, fuel consumption can be decreased; instead of using a torque converter, two sets of clutches are employed, which alternate to achieve seamless gear shifting. The disadvantages of dual-clutch transmissions are: The extensive use of electronic components increases the likelihood of faults; for small-displacement engines, there is insufficient torque at low RPM. In congested traffic conditions, prolonged operation in a semi-clutch state can cause the clutch to overheat, leading to transmission failure and potential vehicle stalling.