The lovely electric boot that's standard on the current C Class estate - anyone had trouble with it? Mine seemed to get jammed although the boot did the initial clunk of unlocking leaving a 1cm gap from the bumper. It stopped there but the hydraulic ram was still pushing hard and forcing the panel gap at the top of the boot by the hinge out it wouldn't stop or relock itself. After about 3mins it stopped and then opened as usual and has been fine since. Anyone had trouble with it too?