I plan to buy a car (a Mercedes c240 4matic from 2003) with AWD. I heard, all-wheel drive is really good in winter, and maybe on the mountains. But in sommer it's only a waste of gas. The engine has 170HP. Is it possible do deactivate the rear-wheel drive of 4matic? Could this lead to the damage of the engine or any other parts of the car?
Does somebody has experience with 4matic? Somwhere i read, that (at least in the models before 2000) the 4matic has a "supporting" function: the front tires are driven, if the rear ones begins to spin. But in the service center, they told me, that 4matic is a permanent AWD (maybe in the brand new models?). Here is an interesting post: Difference between FWD/RWD/4WD/Part-Time 4WD/AWD? I'm not sure, what exactly 4matic is.
Thanx in advance, Daniel