I think . . .
The rear door locking mechanism probably needs to be replaced. A common failure.
The boot may just need resetting. Hitting an obstruction while closing shouldn't have broken anything. When it's open, see if you can push it open any further and then close it.
Windows. Just reset the one-touch open/close setting. Instructions in the handbook.
Electric heater: No idea. But FWIW, mine doesn't seem to do much either.
The rear door locking mechanism probably needs to be replaced. A common failure.
The boot may just need resetting. Hitting an obstruction while closing shouldn't have broken anything. When it's open, see if you can push it open any further and then close it.
Windows. Just reset the one-touch open/close setting. Instructions in the handbook.
Electric heater: No idea. But FWIW, mine doesn't seem to do much either.