decided to replace the original battery on my rcz 2.0hdi yesterday as it was showing its age. I thought that it would be straightforward but took quite a while to swap over. Anyway, I eventually managed to do it and now the car wont even crank. the spoiler has come up on its own yet the manual indicator light is not lit and I cannot retract it, and the drivers window has gone down but will not go back up. car was absolutely fine prior to the battery swap is fully maintained and has covered 46k only. My wide and I both work in busy NHS centres, ive been stressed out all day as the car now has a bin liner on the door keeping the rain out, and upon ringing a number of garages I have been told its a window mechanism, an alternator a starter motor and an ecu by different experts. completely lost all faith now.