My full-time, factory trained MBZ Lead tech friend constantly nags me to have him roll in a new chain-my '92 500E has 94k miles. I plan to do it at the end of the summer.

Unless the car's been on Synthetic changes every 5-7k miles since birth, and you have the documentation to prove it, I'd pop for a new chain & upper rails-reasonably cheap insurance, as the job should cost less than $1k parts & labor.

FWIW-if the chain lets go, and this is indeed fairly rare, you're looking at large to HUGE dollars

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo