I have a few cars among them are a 1999 ML 320 and a 1992 300 TE estate wagon. When I tow a trailer or a boat I use the ML. I've towed with the station wagon and it will do the job but the handling of the wagon is degraded and it just doesn't inspire confidence. The wagon is more comfortable than the ML.

I also prefer the ML if I'm going to the mountains, plan on driving on poor roads, like forest service or gravel road and also in snow or any other bad weather.