At 570 miles the pulley on the alternator wore a hole in the bottom radiator hose. I was 450 miles from home in west Texas. The dealership took a hose off a new car on the showroom floor to get me on the road, however it turned out the water pump had an incorrectly formed flange. The nearest water pump was 10 days away in Germany. They rented me a car to finish my journey. Once the new water pump came in and the old one was replaced the dealer I bought the car from in Dallas sent a truck 250 miles west to pick up the repaired vehicle, haul it 450 miles back east to my driveway. The service was incredible and Mercedes has my highest praise. Just returned from a 2,000 mile trip to Minnesota.
I recently traded in a 2011 BMW 535ix, which I found to be one of the most uncomfortable cars I have ever owned, on a 2013 S550, which is the most comfortable car I have ever owned. The car is absolute serenity to drive. No wind noise; no engine noise; no tire noise. The V8 is 430hp/520lb-ft of pure butter. Sure, the car is big and heavy, but it carries its heft very well and it does not claim to be the ultimate driving machine (whereas the BMW did, and it was far from it). The S550's adaptive air suspension is more butter, and it keeps the car stable and level, even during spirited driving.