if you jack it up the shock is used to a spring of x amount so the spring stays in place were as if you have a shock of x-30 there is going to be 3cm diff between the shock and the spring, doesent always slip out but it can as happend to my mate in sainsburys carpark when he tried to change his wheel after a flattie.
doesent slip out asin its laid on the floor, just doesent sit corectly on the shock due to the amount of play between shock and spring, all you have to do is use one hand to hold the spring in correct place as your jacking it back down and wownt slip out when driving cause of the weight of the car.
could be wrong and that vw have a different type of shock but on a few cars ive seen running standard shock and lowering springs they can slip out when jacking the car up
