I was recently informed that I shouldn't engage "Sport" mode on my 2006 MBZ R350 for extended periods of time-- i.e., driving around town, while on the freeway, etc. Doing this is putting too much stress on my air suspension system-- according to a mechanic friend of mine. My question is whether or not this is in fact true.

It was made with a sport mode I would hope the vehicle could handle it. I dont think it would be neccessary driving around town but it shouldnt hurt it.

My only problem with this is that I prefer driving my R-Class with the stiffer suspension. The comfort suspension is too soft, while the "regular" setting (neither "sport" nor "comfort") is just meh... If I can't (shouldn't) drive in sport mode I'd rather drive a BMW X5. I really love the utility of my R-Class -- our boys are both over 6'4" & I can fit our dog's XL crate in the rear as well. It's the perfect car for road trips even though both of our kids drive their own cars its great for going in one vehicle.