mate of mine had a Merc A-class with the sticky film on the doors round the B-pillar
one started to lift so the dealer said he would do it under warranty mate was chuffed
5 months further on mate is getting rid of the car and the dealer still can't get these things on right (tried with 4 sets up to date) so my mate tells him not to bother, pulls the three remaining ones off and sells it as is
The trick seems to be spray the surface with water, peel off the backing then slide the sticky stuff on, smooth it off with a sponge then let it dry out fully
will probably still look cack but at least you won't have any bubbles under it