All cars have holes in the chassis for tie-down. Most are oval but they can be other shapes as well. I prefer to use these and cinch the car down tight. You want to make the load/trailer essentially one unit for maximum safety.

Low cars with tight suspension can be secured by the tires without a problem since they don't bounce around a lot. Sometimes I slip nylon straps through the wheels or use "over-the-tire" style straps.

7-10% of the total trailer/vehicle weight should be on the tongue or the trailer will sway at highway speeds.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250