OK. I know I'm going to catch it for this, but you all were very helpful on my skid plate problem (I got the part and installed it myself, found my body shop had installed the old one incorrectly) that I thought I'd ask.
My car is getting really ratty; during the Summer I can generally find a place to completely hand wash it but in the winter it's tougher and I don't really want to do it myself (doesn't need a complete detail yet). So I thought I'd try a place where the track drags the car on one side only through a tunnel in which the actual washing is done by hand. I understand there are myriad problems with this approach but the place I'm thinking of did well with my old S4 so I thought I'd take a chance, IF I COULD BE SURE I'M NOT TOO LOW (I have my 17" Winter Wheels/Tires on so I'm not too worried about scuffing them). Problem is I don't want to take the word of the owner; I'd rather see a car whose clearance I KNOW is the same as the M5 go through first.

So does anyone know if the regular 5-series has greater clearance than the M5? Or has anyone had (hopefully not but I thought I'd ask) problems with the M5 being too low to be pulled through on a track?
Any info would be greatly appreciated. I'm depressed already and looking at my gritty car (and a dent in the door inflicted by a runaway shopping cart) is not making things any better.
=NLK=