need to know what does this codes mean:p1685,p1686 and p1688

Question

I done a diagnostic test on the mercedes and i got these codes and cannt find out what they are.

Answer 1

P1685 Control module Power up temperature sensor

P1686 Transmission control module power up temperature sensor circuit high voltage

The fix and solution is to replace the control module inside the transmission , you will also need a MBZ factory scan tool to reprogram the transmission.