ecmexchange

Things like that make me worried the problem might pop up again. Hopefully it doesn't!

cocobeex

if that poped again, i will replace cam position sensor first.

ecmexchange

This is a good idea. Might be good to have a few ideas at the back of the brain just in case.

sleeperZ96BT

I just had the radiator replaced at around 50k miles under CPO extended warranty - $1,500 or so job that was covered. Began leaking coolant.

@dman

My 2012 E550 was purchased in 2015 with 26k miles, just off lease. I had it OEtuned at 35k miles and it's at 85k now. It's been nearly as trouble free as my Honda/Acuras in the past.
Aside from normal maintenance schedule items, I've replaced the front brake pads & rotors and the motor & transmission mounts were replaced under warranty to cure a persistent low frequency vibration occurring at light throttle just under 1500 rpm.
Good luck w/ your search & let us know what you pick up!