Seasoned BMW Owner...New to X5..4.8is

[NyMench]

Greetings,


Just picked up new to me 2006 x5 4.8is.......Blue/Cream......all options except Cargo Deck. 22,500 miles. Picked it up in DC and drove it home on Saturday. I feared the gas millage at first but was really pleased with an 23.5mpg......

First impressions:

I was very disappointed with the stereo sound quality.....I would love to know if any one has converted the speakers to the BAV Audio set up and was it worth it?

Rear entertainment.....how do you get the sound to come through the cabin when playing a move? Or is this head phones only?

How do you turn on the Sirius Sat radio....i don't see where the option is when toggling am/fm/cd/aux

Side mirrors...they tuck in but do not stay...any ideas?

MOST IMPORTANT:
Extended Warr......Who is the best (direct payment to dealer), Longest in business, most comprehensive coverage.....


I look forward to enjoying the car and getting to know you all....

NyMench