Good, thanks. Your 1997 is the later "smart" version. Mercedes must have made the change during the 1996 model year or at the beginning of 1997. The early 1996 cars have a preglow relay just like that in older models going at least back to the last W123 diesels.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .343,000 miles Wife's car
2005 E320 CDI . . 148,000 miles My car
Santa Rosa population 177,300 (2026 projected)
Total. . . . . . . . . . . . 668,300
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970