Having just acquired a '93 190E Sportline Special Edition (black leather with red piping), I have been researching the Sportline history and background.
I note that the rectangular front fender badge for the '92 and ''93 190E Sportline package has the name "Sportline" in white on the left, with a light blue logo to the right of the name which is the right slanted, decreasing size trapezoids which is the AMG logo (see the link to a good picture of the badge below-- sorry that I don't have the skills to paste it into this thread, but perhaps someone more computer adept might do so).
go to:
http://pursuitme-auto.tripod.com/ then click on the1992 Mercedes-Benz 190E 2.6 Sportline black -- the picture of the Sportline badge is about seven pictures down [this is from, I think, a Russian car sales site].
The logo would imply that AMG produced the Sportline suspension for the '92 and '93 190Es -- which would appear to be their first factory collaboration with M-B for a car sold through the M-B dealerships (as distinct from the 1986 Hammer, which was an aftermarket tuning job).
The AMG history recites:
1993: The first vehicle jointly developed with Daimler-Benz goes on sale in Europe--the C36 AMG. AMG is registered as a trademark.
1993: AMG components available through M-B dealerships in the U.S.
1995: C36 AMG type approved for sale in the U.S.
However, Sportline cars were available here in '92 and '93 -- the '92 (presumably first available in the Fall of 1991) would predate the European development of the C36, the registration of the AMG trademark and the '93 "availability of AMG components" through US M-B dealers.
Did AMG supply the Sportline components to the M-B factory for M-B installation in the 190Es (as distinct from the current production of AMG cars where the body shell is shipped back and forth between the AMG and M-B factories and the separate staff of AMG and M-B each do their own work on their portion of the car)?
Any additional info or insights would be appreciated.