When I was a kid, I remember driving with my Dad in his 69 280s. I'd say about 75% of the other MBs we'd see would either wave first or wave back.Almost never see it now when I drive my 190E. However, I get the thumbs up from 90% of the Scirocco drivers I see , but less than 5% of other VW drivers when I drive my Scirocco.I guess it depends on the rarity of the vehicle?

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1987 190E 2.3L (Daily Driver)
1985 VW Scirocco (Mint-Summer)