The rear hatch on my 08 E83 disengages a few minutes after it is securely closed. I had a similar issue with a faulty actuator on an E34 Touring some years ago. As one would expect, the rear compartment lights illuminate once the hatch becomes ajar and drains the battery. I'm wondering if a lubrication of the latch will resolve the problem or make it worse (?). As always, advice appreciated.