In my previous card I left the rubber mats in 100% of the time. I'm trying very hard to take much better are of my Q5, though
Now with my first summer here, I've switched back to the carpeted mats. Still have some hints of salt stains I need to work harder on, but overall it certainly looks much cleaner.
But now my problem/fear is tracking mud and dirt in. Especially if it's been wet, it can be very easy to track mud into the car. Now I'm afraid of getting all the carpeting dirtier rather than getting rubber dirty which is MUCH easier to clean.
So what do you guys do - rubber mats always, or do you deal with the carpeting?