Well I guess jumping it yourself is the only way. What size engine did you try jumping it with ? I've had mine jumped by Roadside--the portable box they had wasn't enough so he also had to connect his little mini-SUV to it to get it enough juice + he monkied with the connectors while I was starting the engine--the front connections are tricky.

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2008 X5 4.8
Jet Black/Black Nevada/Dark Burl Walnut
Adaptive Drive
Premium Pack
Tech Pack
Climate Pack
Sport Pack
20" Wheel Option
Premium Sound
Sirius Satellite
Rear DVD Entertainment
Multi-Contour Seats
Comfort Access
3rd Row Seat
Heated Front Seats
Running Boards
3M VentureShield Paint Protection Film