occasionally when I approach the Car, to open the door, trunk, or get in, I hear a quiet, efficient whirring sound for a couple seconds, like a small electric motor is running. What is this? First I thought of the Airmatic suspension, but I did not think the Diesels had this.
I just completed putting almost 1900 miles on Her, round trip to Bloomington, ID, including side trips to Indianapolis and West Baden Springs (worth seeing, by the way). Best tank was 39.74 MPG. Perfect performance, could not ask for better. All faces are "smiley" so far.

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Providing a home for these cars:
1951 Buick Special De Luxe
1977 Rolls-Royce Silver Wraith II
1970 Rolls-Royce Silver Shadow
1986 Mercedes-Benz 420 SEL
2005 Mercedes-Benz E 320 CDI
2012 GMC Sierra 1500 4X4
1927 Pierce-Arrow Series 80
1931 Pierce-Arrow Series 43
1926 Ford Model T coupe