Hello Where is the infrared sensor for the central distribution at the slk R170 Bj.97 and how do I build it out. unfortunately not suitable in the search function found Prblem the ZV. does not function anymore also the blinker when I press the key. with key open only the driver door opens. but if I press the button in the middle console both doors on so the zv.pump would have to be ok or and it is on the ZV.Sensor or if I am completely d Greetings klaus