Post
by X5Sport » Wed Jul 20, 2011 1:29 pm
The answer to your question about transmission wear is yes it will. A lot will depend upon driving style, but you will increase the wear rates on the clutches simply because of the extra weight. 1600kgs is well inside the abililty of the X5 as the 'advisory weight' from the Caravan Club is around 85% of the tractor weight for the trailer, which puts it around 1800kgs. That being said, you're probably a lot better off than if you had a manual X5!! That would probably need a new clutch plate fairly frequently!!
My old V8 Discovery II used to eat transfer boxes when we towed. I think in five years we had a new transfer box every year and two new auto gearboxes. Dreadful thing it was - it only did 45,000 miles!!
Towing anything substantial will always increase the wear on the drivetrain and on the brakes as both are being put under more load than if it was just the X5 on its own. Use of the 'Manual' selector is a good idea as it ensures that most of the changes are when you want them, not the computer!! I would not sit in Neutral though as I would not trust the parking brake to hold you and a trailer in the event of a roll-away!!

Never anthropomorphise computers. They hate that.