Looks like the $128 regulator they sell is made by an OEM supplier to BMW and Porsche? Pretty good testimony to the quality of it.
1986 Mercedes-Benz 190E Sedan - Bumpers, Doors, Latches & Lids - Page 1
Magneti Marelli is an OEM supplier to Porsche & BMW.
Pelican quality rating for: Magneti Marelli (EXCELLENT)