I'm starting to think about whether I keep my d beyond the factory warranty. For those that are, have you given any thought to an extended warranty? I know it's a crap shoot and some say no way, just put aside $100/month and take your chances. I did get some quotes a while back froma couple dealers and as I recall, a BMW backed plan for up to 100k miles was going to cost upwards of $3500 for one that covers everything including the electronics (NAV, etc.). What have other found and has anyone purchased one at a fair price and where? Thanks.