As long dove tail as possible, long ramps, and torsion axles for low ride height. If it's an open trailer low fenders or removable fenders so you can open the doors. 16' min but 20 is perfect as you can adjust car position for ideal tongue weight and get good strap angles. Electric brakes instead of surge brakes. Swivel jack and d ring hooks. I could go on and on.
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2013 A6 ZL1
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