W126 production started with the climate system pictured, they were the first to get it. 1985 W124 cars got their climate system first, and it was installed into the W126 for 1986.

The GenII (W124) system does not have the separate "smarts box", everything is done by the bushbutton unit.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.