Hi, regarding the master links - I am an old Alfa Romeo tinkerer, and am new to the MB mark, w/ (2) Euro 16Vs. I bought a new chain W/out realizing that both cars had had both chains & tensioners done w/ in 40k mi. or less. I was quite surprised to find that there was no "clip" style master (like alfa's)w/ the new chain! Over the course of 30years and myriad cars representing MILLIONS of engine miles, I have never experienced a failed chain nor failed "clip" style master link. In fact, a dealer wrench of 12yrs told me he'd seen only one failure, on a new car, which was clearly a defect from the factory. The chains however ARE duplex--
is it possible that a single row puts significantly more strain on the master??