indeed, It sucks when you need to know the thread sizes and pitch of mystery bolts. but! take it to an ace hardware and get them to match it, dont mess with home depoo because they will not deal with metric bolts. Also, dont mention that its for a mercedes if you can, I recall going to a home depot for o rings, went looking for them and mentioned to an employee that helped me find the wrong isle that i was indeed looking for these for my mercedes.. he told me that what ever i was looking for they didnt have it! can you believe it!?? the o rings were on the next isle..

someone earlier posted that it should be softer metal than the caliper... i am weary of that.. call brake team or les shcwabb and get their opinion.. because this fastens your brakes, get it right the first time!


hope that helps