Just a different view , we've just luckily got rid of ours ... Was fantastic to tow with couldn't tell you had a trailer behind you . But constant problems with fuel injectors and perishing pipes made it very expensive :-( the garages we took it to all commented that they are expensive when go wrong and see quite a few with similar problems and turbo issues .
I had mine for 7 years and loved it, didn't know I had a trailer on it. Then got a disco and hated it, turning circle awful and no power. Got a Merc 350 a year ago and love it. It is a blumatic so fuel consumption better. Find a good local garage rather than Mercedes though Or it will cost a lot. I tow 2 with an Ifor Williams 511.