hey wassup guys. I'm trying to change my own oil on my 02 e320 and I know it takes 5-40 mobil 1 synthetic oil, but don't know where to find this oil...I've tried...Autozone, Oreilly, WalMart....please if you know a place to get it from other then the dealer then please let me know cause I know the dealer will charge u more if u purchase the oil from them....thanks guy