Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hello,The low/high range switching is carried out by the electric motor at the rear of the transfer case. It is not uncommon for this motor to seize in one position. Sometimes tapping on this motor can make it move again. This motor can be accessed from below of the ML.Best regards,Stan
Sorry for misunderstanding. The car stays in first or second gear, right?