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Originally Posted by frayed
Old thread. . . fyi I went with a Prodigy controller, and have racked up some miles with an open steel trailer + M3 track car = 5000+lbs. No problems. Tows like a beast. Also been towing my 23' fishing boat on a trailer with no brakes. Pulls hard to 75mph then drag takes over.
Have to use manual shift mode in hilly terrain though.
All in all, great tow machine, though I'm a bit concerned about long term durability, so I'm happy to have the 100k mile/2011 warranty!
Short wheelbase make backing up boat down ramp a breeze, too.
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I knew it was an old thread but there aren't too many pulling the kind of load you show in the photos... so you abandoned the 24' enclosed trailer?? That's the angle I was most interested in. Was it too much for the X5?
I currently have an open trailer and it pulls like a dream. I have surge brakes and that avoids the need for a controller - seems to work fine other than a klunk when they engage and when they release. A friend riding with me to a race commented after a few hundred miles that he knew why it made that sound. It was to let you know there was a trailer back there otherwise you would forget. He was used to pulling an enclosed trailer with a 2500 diesel dually truck.
TIA
PS I've also pulled a 20 foot i/o runabout boat with no brakes and a 22 foot poontoon also with no brakes. Both of those are a bit more of a challenge than the dual axle open car trailer. I agree on the backing.