I believe there is a plug you disconnect under the drivers carpet.
But disconnect the battery first of course.
And I would wait on a tech to answer this. I removed mine on my car to change the wheel.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.