Our previous MH was a gasser. We trailer pulled the pictured Smart thousands of miles on this open tilt bed aluminum trailer. I always tied it to the trailer using a good grade of tie down straps through the spokes of the rear wheels both forward and aft directions. The front wheels are pulled against fixed stops attached to the trailer bed. This method allows the car suspension to operate as it was designed to while traveling down the road.
No longer owned that MH or the Smart, but it worked great while we owned both.
Rick and Lynda Smith
2004 NEWMAR DSDP M-4011-SPTN 8.9 Liter Cummins
2011 GMC SLT 1500 4WD CREW toad