Hi new member from UK. Recently bought new model but noticed that on the inside of the rear passenger doors at the bottom road dirt accumulates. Service c e guy at dealership stated it was acting as a mudguard. The manager stated that he hadn't come across this even though he has been driving one. I'm concerned elderly passengers will brush up against this when exiting vehicle. Anyone else experienced this issue and is it normal as no other make of car including Made as has ever had this?