Originally Posted by johnbob

Okay, so.....

I checked the tie rods, etc. but they all looked fine, as far as I can tell, but then again I'm a novice so... I decided to take it to a local Mercedes mechanic that someone recommended to me a while back but had yet to visit. The goal is to try to do most of the repairs myself on this car and learn as much as possible but I'm a little short on time right now. I also figured it might be good to take the car in and have them diagnose a handful of other problems and then decide which repairs I would like to attempt myself and which ones I'll have done by a professional. Anyway, the issue turned out to be something I probably never would have figured out. Or at least, I wouldn't have figured it out until I tried ten other things first. Basically, the center bracket that holds the exhaust in place and keeps it from rattling around was missing a bolt and the other was stripped so that knocking sound was the exhaust moving around and knocking the bottom of my car. It sounded like it was coming from the front tire but apparently it was the exhaust. I am correct that it was only happening when I made right turns though. Not sure why that was the case but I'm assuming it has something to do with the way it's positioned underneath there. Anyway, he fixed it and also adjusted the enormous amount of loose play in the steering box and also topped off all my fluids and checked all the tire pressure in the tires for $60.00. Although these were all pretty simple things to fix, I am happy that I didn't have to spend days trying to troubleshoot it.