O2
MBWorld Fanatic!
Joined: Mar 2006
Posts: 1,627
Likes: 5
From: West Virginia
2001 E320 RWD - Brilliant Silver/Ash: 100,000+
Those are normally a 100,000 mile routine replacement part. You can do them yourself and save a ton of money compared to a dealer if you are good with a wrench. If they are definitely needed, I would buy the parts online from autohausaz.com and find an independent shop to do the labor. When one, or more, go bad they trigger a Check Engine Light. Are you sure you need to replace them now?
