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Mrcarmax ltd Harrow 0203 674 7100
Mercedes a class b class gearbox problem. Not going to any gear. Could be torque converter selector unit shafts or Cvt chain , visit workshop message limp mode . repair cost is around £600.

Possible errors:
P1815 / 0717 - The Speed Signal From component Y3 / 9b3 (primary speed sensor CVT continuously variable transmission) is not available
P1826 / 0722 / 0794 - Speed signal from component Y3 / 9b5 (output speed sensor CVT) not available
P1939 / 0793 - Speed signal from component Y3 / 9b4 (secondary speed sensor CVT) not available
P2198 / 0730 - The gear ratio in the transmission (CVT) is not permissible
0720 - Speed Gradient
0723 - The rpm signal from component Y3/9b5 CVT (output rpm sensor) is implausible
0739 - The rpm signal from component Y3/9b4 CVT - secondary rpm sensor is not available
0794 - Intermediate Input Shaft Speed Sensor Signal
1634 - Component Y3 / 9n1 (CVT) is defective or the power supply is faulty (under voltage)
0896 - impermissible adjustment of the step down ratio in the continuously variable automatic transmission (CVT)
Transmission Visit workshop warning on dash
Transmission can go straight into limp mode when selecting drive, slipping, loss of all drive and unable to select drive. These symptoms usually start off intermittently and become more frequent until total failure.
more mechanical issues p2732 hydraulic problem, p0894 cvt belt issue.
d408.