I SCREWD UP AND POURED TOO MUCH OIL IN TO THE ENGINE. ('98 S500) NOW WHEN I CHECK THE OIL LEVEL, IT'S CLOSE TO 3/4 INCH OVER THE MAX LINE. SOMEBODY TOLD ME, THAT OIL NOW CAN BE SUCKED BY THE ENGINE THROUGH SOME PIPE TOWARDS THE INTAKE OR SO... IS THAT TRUE ? SHOULD I DRAIN IT OR SIMPLY LEAVE IT ALONE AND DON'T WORRY ???

You can remove the oil, with an oil extraction device such as the Topsider or the Liquivac, sold in Mercedesshop. It is a pumping device with a tube that you insert into the dipstick.

I think you will need to remove about 3/4 quart of the oil.