I will vouch for high
cost of parts for Honda and Mazdas, having owned both. I MB parts prices are in line when purchased from Partsshop.com
I like the E320 a lot but in all honesty when I have to run to the grocery or make a short trip (under 5 miles) I take the Honda. I don't like to run the MB unless it is going to get up to operating temperature. The Honda feels more like an "in-town" car.