Join Date: Dec 2005
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Hello and welcome to the forum.
The part you need for the window is called a regulator,they are a common failure on most of the Renault range I'm afraid.
As for the immobilser,it could be a damaged key chip or the aerial around the ignition lock barrel playing up.Have you got a spare key to try?.
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