I would definetly stay away from anything that is supposed to fill in the fine scratches in the cylinder walls. Simply because that same material could plug your oil filter. Religous oil changes, with good oil will be all you need to do. BTW MB allowance for burning oil is as high as 1 quart every 600 miles.
1994 MB E320 Coupe (199,500 mi)
1992 MB 190E 2.6 (173,000 mi)
1983 Porsche 911SC (148,000 mi)
2004 Volvo V70 2.5T (198,000 mi)
President of CT/Westchester Section