The power rear hatch on my 2007 ML320 fails to open without manual intervention. It fails when activated from either the key, button inside the vehicle or the latch on the hatch itself. When I inspected the mechanism, switches inside the hatch, all appeared to be in order. This leads me to wonder if I have a control relay issue. Of course MB holds any information regarding relays and fuses as a closely held secret. Can anyone help me in my quest to resolve this issue.

thanks