I don’t like to drive a dirty car, advice like “buy another one.” don’t really help. Most of all, the dirt on top of the rear bumper corners wrung me. So far, I was in the belief that this comes from the draining water/lubrication of the rear door. Today, I found grass there after I had to drive a little over the meadow yesterday in relatively dry weather. And obviously, the inner wings are not flush on the outside wings. , at least not in the rear, lower part, the dirt whirled up by the rear wheels is looking for a way past it sideways. Can anyone confirm this suspicion and possibly give a remedy to get the wheel box really “dark”? Cheers Carsten