I've noticed this problem on several e36 and e46 BMWs. The driver's side seatbelt seems to rub on the left side of the seat, and eventually wears out the stitching on the leather, and also can lead to damage of the seat itself.
Does anyone have tips to avoid this? Our 2000 e46 323i wagon driver's seat stitching is already starting to fray.
Also, what's the right designation for wagon? 323ti? 323xi is the all-wheel drive version...