e70 auto liftgate problem

[atreidy]

Hello everyone:

My 2009 e70 diesel liftgate was acting up and now is getting progressively worse. Trying to troubleshoot myself as much as possible because I think this type of situation could cost a ton at a dealer out-of-warranty. Done a TON of research on different forums .. nothing seems to match my symptoms .. really hoping to get new information and help from the awesome members here

Problem 1: Lift gate doesn't close with the button on the lift gate. (Original problem)
Symptoms: There is a clicking sound near the lid's latch that repeats every so often. Sometimes every 10-15 seconds to every 45 seconds while the lift gate is open.

Problem 2: Liftgate sometimes opens randomly while driving at low speeds (at stop or near stop). Hasn't been a hazard yet --> if it opens while driving at higher speeds I would definitely take to a dealer immediately.

Problem 3: Liftgate appears to not open to maximum height even with the idrive settings to top-most level.

Things I've tried:
-Slamming the lower lid.
-ensuring the keys are not in my pockets so I know the random opening isn't my fault

Yet to try:
-Battery does not appear to have been changed according to service records. I will get my hands on a multimeter to check voltage. What should it read?
-Hitting the relay or replacing it - dont' know where the relay is - anyone know?

THanks in advance.. going crazy here