Hello everyone,
a year ago I bought the Opel Signum 2003, 3.0 CDTI, automatic gearbox.
The trouble begins when stopped at the crossroad and down the brake pedal.
Then the machine jumps once or twice ahead a few centimetres, but it happens when the machine is warm.
Diagnose the OP COM, showed code P1704-62 'no engagement of clutch C1 at a neutral control on "
But that guy didn't say what is it and how to fix it.

Please help ....

Sorry for bad English