The part mentioned listed these Mercedes options:
Mercedes: M 102, M 103, 190, and 300E

That is why I asked as it does not state the 112 engine or the E320 either the W210 or my W211.

L

http://www.toolsource.com/74mm-filter-wrench-chrysler-ford-mazda-mercedes-toyota-0219-p-98868.html

This tool (different model) from the same web site states it is for the 1998-2006 Mercedes all models with V6 or V8.

This is a different tool.

Which one is the correct one for my V6 M112, W211 04 E320?

Easier to make sure here than return the wrong one and exchange it

L

Either one will work. I believe the 2175 was the original model. If you order from the dealer, I believe you get 74.5 mm / 14 flute.

Promise you won't laugh but I just looked under the 04 E320 and could not see a drain plug for the oil.
Do I have to remove a panel? Which one.
And, how easy is this just jacking up the car and putting it on stands?
L

W210's and I assume W211's come with plastic panels (usually 2) on the underside. Some times called anti-noise panels. To change the oil the old fashioned way you'll need to remove the front one. There are 4 fasteners near the centerline. Two near the bumper and two at the engine cross member. The rear two are shared by the smaller second panel. In addition there are 3 near the front of each wheel. 8mm socket or wench.

The drain plug is on the right side of lower oil pan. If you are going to drain pick up a seal from dealer. Goes under drain plug. Torque is 30Nm and size is 13mm. Torque on filter housing is 25Nm.

Jack stands are fine but use on a hard level surface such as concrete. Also. chock one on the wheels on the ground in both directions. If you don't have hard level surface, then ramps are a safer choice. In a pinch, some people drive one front wheel up on to a curb to gain some clearance. Depends on the neighborhood.:D

Thanks RM98 for the excellent directions.

Much appreciated and copied to my E320 folder for safe keeping.

L