Join Date: Dec 2005
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It's really only neccessary to disconnect the battery if your working on the starter motor or alternator circuits,or anywhere where there is a permanent feed from the battery.The heater blower has no feed to it when the ignition is switched off,so as long as you keep the keys in your pocket,you'll be fine!
Good luck and let us know how you get on.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo