Hello I changed my gears old for new. Since I wanted to try whether the gearbox goes and turns on I left the car noh. But now when I start the engine stutters the whole and the TC indicators always lights up and off. When I press the button it runs but that doesn’t turn on. Can this be if the car is bucked up that doesn’t turn on? My right question is where is the gear control unit I wanted to change this. In the engine compartment into the trianglek asten is only the motor control unit and behind the manual drawer is a control unit with me there is TC on it but have found no further control units today and can help with bitte