I am pretty mechanically inclined but stilll had a few questions regarding a 2004 E320 after my researches. The car is not mine as I am doing this for my father.

*Do you guys prefer the TopSider or Mity-Vac?

*I was told that there is no oil dipstick and that the computer told you the amount of oil in the car (whether it's low, high, etc.). So where do you "vacuum" out the oil (do you do it at the oil cap?)?

*(After the removal of the undercarriage guard) Where is the drain plug approximately located?

I want to thank all inquiries in advance.