hi i want to buy a slightly used mercedes clk 350, or 500... i test drive the car and i really like it.. but.. i like to work on my own cars.... just because it is fun. & the dealer told me an oil change would cost $200 at the dealership... i think thats alot... considering.. oil is $20....?? and i always did the oil on my other cars.. soooooo i wanted to know if i could do it myself.. the clk would be around 25k.... and thats not bad but i kindof conserned about how much maintanance would be..i heard doing the brakes cost the dealership $1000..?? can i do that myself too?? o i need special tools considering it is a mercedes??? someone please help me out... give me sum insight.. alot of people are telling that a mb is a waste of money..??