On my 2000 CLK someone had chopped up a lot of the wiring just to make a mess for whoever bought it. I use alldata and printed out the wiring for the top and there a lot of limit switches that have to be in the right place to make it work. With the connector plug unplugged from the top controler and a ohm meter you can read out whether the switches are closed or not. Most of them go to ground. I use a clip lead with a needle in one end to shove into the connector. The other lead I hook to a ground. Jerry