CLK 320 oil change procedure

Just took a look under my CLK and noticed that there doesn't appear to be an oil drain plug anywhere within plain view...<br>
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Also, what is with the oil filter assembly? I know that MB's are different creatures but this car has me baffled...

There is a drain plug and it is located at the side of the oil pan (left side if you're facing the car). Not obvious when you look underneath but it is there.

under the car to access it.

Hmmmm... drove my CLK 320 up onto a set of car ramps, looked all underneath with a light and still didn't find anything that even resembles an oil drain plug???????