First I see conflict in OP logic.
He says he buys the car observing expenses, yet he bought S class for his commute?.
Makes no sense to me.
I guess the flow in my logic was taking for granted a wrong premise: I wrongfully thought that Mercedes makes reliable cars
. I thought that spending $25K on a car which can yield another 250K Mi is a better investment than two new ford. What I did not realized was that 250K additional miles on MB will cost me $30K more in repairs.
Now I know that utility is an Lexus 430LS Long which is very reliable. Unfortunately I don't like the way how it handles bumps on the road, also it is not as fun to drive as S500 4matic.