 We bought the Sprinter 3500 brand new in 2016 with LTV RV Serentity motorhome.  On our first extended vacation we have had 2 breakdowns.  We travelled from Florida to Colorado for the first half of the trip and the engine blew an oil seal in Montrose, Colorado going up a long grade.  Oil covered the engine and body of the vehicle.  This was repaired, although oil continued to leak for several more days (residual on vehicle body).  Three weeks later, the engine lost power and would only run at 10 to 15 MPH on I 90 heading toward Butte, Montana.  We almost lost our lives when this happened.  We were able to drive it into Missoula, Montana to the dealership.  The next day, service said there was a wiring harness problem and they ordered new parts overnight, but don't expect to have the vehicle repaired for 2 days.  We called Mercedes customer care for assistance with trip interruption expenses.  We were told that the Sprinter line of vehicles is specifically excluded from their concierge customer care program.  So here we are...on vacation, stranded in Missoula and unable to continue to Glacier National Park.. our dream destination and we are stuck with unplanned expenses and non reimbursable reservations.  We know that all vacations have to come to an end, but never would I have guessed that Mercedes would be the cause of that. It is really so sad that a once great vehicle manufacturer could become so bad and that they could care less about you as a customer.