Thanks Frank. Fuse #19 still lists the Heated Seats as on that circuit, but my wiring diagram also shows a separate Aux. Fuse for the Front Seats.

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1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1986 Porsche 928S Goldweiss/Brown