I use the Mityvac 7200 series that works nicely. I have a pit in my garage designed for doing my own work on my vehicles, especially oil changes, but the reason I bought any style of oil extraction system is the drain plug location of my M-Class. The plug is directly above the steering control linkeages. Without some type of home made diverter the oil will splash all over, thus it was a better option to extract the oil rather than drain it.

Jim W.