|
I don't know of a way to test, other than to get a rebuilt amp, install it, and see if it works. If not, then it's most likely the actuator. I'm assuming you've checked the fuses, electrical connections, etc. I'm not familiar with the linkages on your car specifically, but if it's anything like my cars, the little link arm (with a ball socket on each end) is available from any dealer (or online MB parts place) relatively cheap.
HTH,
|