I reversed my p38 into my very tight drive as I knew the battery would go flat whilst on holiday.( jump leads wont reach from rear to front of car). Can't open driver door as tight against shed. I didn't realise that the passenger door has no key lock. Now battery is flat so no central locking, and I cannot get into car to jumpstart. Can I drag it forwards 6 inches so I can open the door or will this damage anything?( gearstick in park)