Hi I am new to this site. I recently bought a 84 300SD for a comuter car and fell in love with the Benz. My wife now want's one of her own. I am looking at a 97 E320 with 126k on it. All of the maintaince done by Mercedes. Nothing major done to it except a air flow sensor recently. I do all my own maintance so I was hoping it wouldn't be too costly? How reliable is this model? Anything I need to be worried about? Any help would be great