As mentioned above, the Bluetooth phone integration is excellent. It makes dialing numbers from your phone's contact list very easy. For security, it also lets you set your own PIN.
The navigation system--DVD-based with this older generation of iDrive--does an excellent job of integrating live traffic and alerting you to problems on your route. But it is rather slow, especially when calculating new routes. The new system, which we saw in the 335d, is hard drive based, with more detailed maps and quicker operation.
And in the X5 xDrive35d, the old version of iDrive takes you to address entry when you choose the menu item for navigation. To see a map, you have to do four more motions with the iDrive controller. We would prefer a quicker way to bring the map up on the screen.
Our test vehicle was equipped with iPod integration and a USB port for thumb drives, satellite radio, and a six-disc changer that read MP3 CDs. The iPod and USB port, situated in the center console, was particularly convenient.
We were pleased with the sound quality from the stock audio system in the X5 xDrive35d. It accentuated small door speakers and front tweeters with a center speaker and subwoofer. Clarity was particularly good, as we could hear distinct snaps and clacks in some tracks with complex percussion. Separation wasn't all that great, however, as tones seemed to muddle together, making it difficult to distinguish between singer and instruments.
One interestingly useful feature we found was automatic hold. When stopping the car, a temporary parking brake engages, letting you take your foot off the brake even with the transmission in drive. As soon as you give it some throttle, the parking brake disengages. This feature works great for hills and long stop lights, but would be a problem in stop-and-go traffic. Fortunately, you can easily disable it.
Under the hood
The 2009 BMW X5 xDrive35d gets the same engine as the , a 3-liter, straight, six-cylinder diesel with two turbochargers. The engine uses one small turbo for slower engine speeds, such as accelerating from a stop, and a bigger turbo that takes over when the engine is up to speed. This system is intended to reduce turbo lag, and it largely does the trick. The X5 xDrive35d doesn't exactly bolt off the line, but the acceleration is fairly linear.
As with the 335d, the engine puts out 265 horsepower and 425 pound-feet of torque, that last number giving the X5 a powerful push when it gets going. Because it's a diesel, engine speeds are low, with redline at only 5,000rpm. But where the 335d would cruise along at 1,500rpm on the freeway, the bigger X5 takes a little more oomph, requiring about 2,000rpm.
The weight of the X5 xDrive35d shows in its mileage, getting 19 mpg city and 26 mpg highway in EPA tests. We saw an average of 23.5 mpg in freeway and sport driving. But that still beats the gasoline-powered X5 substantially. We saw about 16 mpg with the 4.8-liter V-8, and the 3-liter, inline, six-cylinder version has an average EPA rating of 18 mpg.
Full-time all-wheel drive gives the X5 the capability to handle slippery stuff, but it also comes into play during fast cornering. If you can actually get the power up in a turn, the wheels do a good job of digging in, which keeps slip to a minimum while the sport suspension counters sway. In fact, the X5 only comes second to thein on-road handling for SUVs we've tested.
The 2009 BMW X5 xDrive35d comes in with a base price of $51,200, but being a BMW, the options add up pretty quickly. Our vehicle was equipped with the Cold Weather package, for $1,250; the Premium package, which brings in autodimming mirrors, a telematics service, and an automatic tailgate, for $3,200; and the Sport package, with electronic suspension control, for $3,700. Add to that optional Comfort seats for $1,200, a smart key for $1,000, iPod integration for $400, navigation for $1,900, and satellite radio for $595, and the total comes out to--with a $825 destination charge--$65,270.
In rating the BMW X5 xDrive35d, we didn't find the diesel engine gave it the same kind of performance advantage as it did the BMW 335d over its gas counterpart. There is a fuel economy improvement over the gas version, but the acceleration suffers--although the handling is still good. The basic functions of the cabin tech, navigation, iPod integration, and Bluetooth phone support are all very good. For design, the old iDrive interface makes it suffer a lot. Now that we've seen the new interface, BMW can't upgrade fast enough.