On one of my rock auto parts buying binges I bought that same rear strut for my 300m for $6 - because it was $6. I hope I never have to actually use it. But seeing that rear knuckle out of the car reminds me when my '00 300 was 12 years old - I spun around on an icy road and the rear tire hit the curb. Bent the axle down and cracked the rim. But no leak. I drove like that for a few months until I bought a new knuckle from the dealership. It was only while doing the replacement I discovered the bearing race had cracked in several places. So I had to get a new rear hub. I put the wheel with cracked rim in my basement. It's still there, still holding air.