I have a 1995 Scotty Dodge 25ft. with a 12 valve Cummins diesel. I pull a enclose car trailer that holds 2 antique cars behind the dodge with no problems. I get 12 to 14 miles mph. Its been garage kept since new and still looks new. Every place we go someone wants to buy it. You can't beat a Cummins. If I was to replace my Motor Home it would half to have a Cummins. If just the motor Home without the trailer 16 mpg. The trouble with the Mercedes if you break down the cost is super high and I mean high for repairs. I have a friend that has one and he was having trouble and the cost of repair was over 3,000. for a control box. I would check around with people that has one before buying one.