How do I gain access to the Boot of a W202 C Class......its battery is so flat I had to enter the car using the skeleton key, however, it would appear that at some stage maybe the rear boot lock may have been changed as the skeleton key will not go into the lock and it only works on the drivers side door lock. Naturally I need to get into the boot to gain access to the battery. Question...is there a way to start the car with a Jumper Pack by attaching it to some live connections in the engine compartment??......I know that on a W210 E Class there is a "Live" terminal where you can connect a Jumper Pack, however this does not appear to be the case on a W202. Any idea's?