I’ve driven diesel since 1985, but after my experience with our 2012 Passat TDI SEL (sold to purchase this vehicle in 1/16): def tank heater failure (twice), diesel fuel pump failure and subsequent replacement of the whole fuel system, O2 sensor failure, other sensor failures, iffy diesel fuel quality with a picky engine, and a number of recalls (fortunately all covered under warranty); I came to believe that recent diesel emission technology implementation was not keeping pace with regulations and purchased my naturally aspirated gasser. So far I’ve put just under 23,000 uneventful miles on it. Love the quiet smoothness of the ML; and at 6’5”, the comfortable driving position and space. Now that I am retired and am not running up the miles like I used to, I am quite satisfied with the ML.

We also own a 2008 pre-DEF Sprinter (diesel) modified with a lift that we use to transport our 23 year old wheelchair-bound son. After horrendous problems with Dodge attempting to service our Sprinter, I started bringing it to the very competent folks at our local MB/Sprinter dealership. Although we pay dealer rates for service, we’ve developed a very good relationship with the SA’s and mechanics there. They know we count on it to transport our son, and they treat us (and our vehicles) well. Have not had any issues (and cannot risk any, given our son’s medical needs) with the van since we started using them and the price of service has been acceptable.

Purchased our ML at 27,000 miles with an existing factory warranty, used this forum to identify a cost effective source for an extended warranty, and I purchased a maintenance package (at a 30% discount to regular dealer servicing prices) to cover the 40 - 60k services. I may consider doing the same, if it’s available, following the 60k for future services.

I hope to keep each of our vehicles for 20 years and 200k+ miles with regular maintenance. Time will tell.