You see, because they know you don't know much about this subject, they are going to skin you alive.

As to the post saying how easy the oil change is by just finding and removing the drain plug, I would make this comment. It's pretty obvious from your question that this is new territory for you. You can't just remove the drain plug. You have to have a floor jack (trunk jack unsafe), you need a jack stand for safety, you need a metric socket set and a ratchet. You need a drain pan to catch the oil. Now after all of that you need to take the oil to an AutoZone type store and dump it in their recycler. Now to get it there you have to pour it in an empty gallon milk jug or similar container. Messy Messy. Starting to think twice about saving money changing oil?

The topsider makes all of this very easy. No crawling under the car. No drain pan. Easy to take to the recyler.

I know there are people who insist on draining using the drain plug, but the cars are designed for extraction with suction out of the oil tube. Why do it the hard way?

Here's what you should do. Find a local MB or Foreign car specialist. Tell them you want a Mann, Knecht, or MB filter. Let them tell you what oil to use and when to change it. Highest possible charge $50.00 with dino oil, not $200.00. Mobil 1 at a shop? Don't know maybe $7.00 per qt. x 8 or 9 qts in
V-8. So synthetic could be $75.00.

Another alternative is to buy your own filter, online or even at the Dealer, and take it to Jiffy Lube.

Also , I believe, MB recommends oil level mid-way between the min and max mark. Definitely true for the inline 6's. Not sure about the V-8's.

Recommended oils are in your owners manual.

Steve