Re: quadralift linked to door locks?
Regarding oil change, If you don't want the QL to do anything, leave a door open. That stops any lowering dead in it's tracks. I started leaving a door open after it tried to adjust on me while I was hooking up a trailer ... good way to loose a finger.
Edit: To the OP, mine is like Bill's, other than a little adjusting to achieve level, it stays in whatever height I parked it in.
The bling wagon: 2014 Grand Cherokee Limited, 5.7, RA4, Lux2, OA2 sporting LTX A/Ts
The mileage slave: 2010 Jetta Sportwagen TDI