Gilly has spoken!

M104 chains rarely fail at that mileage, and at best, the tensioners would be the only thing that would (possibly) require attention.

But this is a clear case of "if it ain't broke, don't fix it"!

__________________
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car