The rear corner panels on either side of the tailgate (black plastic) can crack or break. They should be cut off and the adhesive removed before new panels are glued on.
Car Problem Reports
Mercedes-Benz ML320 Rear Corner Panels on Sides of Tailgate May Crack/Break
Mercedes-Benz ML320 Problem
Average Mileage: 88,125 mi (65,000 mi - 116,500 mi)
Pieces of plastic on back corners of car next to rear glass cracked on both sides.
Visitor, 2001 Mercedes-Benz ML320, 100,000 mi
yep, me too
i got the car used and ever since i have it this has been an omgoing annoyong problem that is not an inexpensive fix. each side is at least 150.00 each plus install, so guess what ? it was never done and it spoils appearance of the car!
Visitor, 2000 Mercedes-Benz ML320
both sides are cracked
Visitor, 2001 Mercedes-Benz ML320, 65,000 mi
Not yet repaired