Date registered: Jul 2004
Vehicle: 1991 500SEC sub 50K mi. 1987 560SEC Now 150K mi. 2018
Location: Boston, MA area
Mentioned: 19 Post(s)
Quoted: 418 Post(s)
I may be misunderstanding you as to what is meant by the word 'units', but if you mean the vacuum pod actuator  for defroster nozzle flap A0008004375, it is the same Gen 1 to Gen 2.
Hope that sheds some light.
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91 500SEC EURO Germany
87 560SEC USA 49 State Version
Last edited by MBL87560SEC; 06-05-2019 at 06:19 AM.