The air canister mounting bracket has already broken. Same break as the original; at the arm that extends out towards the passenger side fender.

Think I might just leave it and eventually unbolt the broken piece. Not sure what is causing this thing to break, motor mounts are newish...not too much shaking considering...

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1982 240 D, 308,000 - 321,127 miles (sold)
1982 300 TD,166,500 - 226,000 miles
1998 E 320, 120,000 - 144,000 miles
2005 C 230 K, 26,000 - 77,000 miles (sold)