If discnnecting the motor and powering with a battery doesent work, no. Will need a ramp to check it out. Did you reset the computer? There are lots of connections and fuses and relays under the rh rear cover in the rear. And maybe more next to the motor near the spare wheel.
Managed to get it working... Don't know how exactly but there's a lever under the rear seats. Pulled it a couple of times and the kneel started working. Seriously need to get myself a new set of wheels!