I just finished retrofitting the cruise control to my A3, reconnected the battery and heard fuel pump prime and realised I'd left the keys in ignition with it switched on. Closed the bonnet and went to open car door and found it was locked! I can't believe it locked on reconnection of battery and I'm such an idiot for leaving them in with the ignition on. I haven't a spare key. Please can someone offer some advice as I'm at a loss, I really don't want to have my door forced.