ohlord, I have heard about this oil dipstick suction thing for MB but as I need to change the oil for the first time on mine I didn't really believe it to be true. Can Idrain the oil the old fashioned way on my 1990 300? To be sheepishly candid I haven't actually looked for the oil drain plug, I see the filter lurking up underneath the air filter housing so I just assumed there was a drain plug down underneath...not? thanks..cliff