Does anybody know where I can find "F22/1 Auxiliary Fuse Holder (trailer hitch/HS)" The HS is for Heated Seats. This 16A fuse feeds the Front Heated Seat Control Module in my '91 560SEL. I looked in the online Body & Electrical manuals but while it is shown on the wiring diagrams for the heated seats, there is no clue as to where it is physically located.

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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

I don't know for sure but I'd be looking for a fuse box in the trunk. It might be visible just by looking or might be under the spare tire cover or in the quarter panel area behind trim panels. On some cars the fuel pump relay is in the quarter panel area as well.

Also look under the rear seat.

W126 doesn't have a fuse box in the trunk. It is under the hood by the brake booster.

This link may be helpful:
1991 560SEL(Euro): Help Identifying these Auxilliary Fuses, Please

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Many thanks for the information Diseasel300. That really helps.

__________________
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

D-man:

By '91 there may have been a change to a separate fuse holder, however, at the beginning of the 126 GenIIs ('86) the front seat heating was through Fuse #19 in the main fuse box.

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.

__________________
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

The heated seats changed in 1989. '86-87 used one design, '88 used its own, and '89+ used a different one. I mean how many times can you redesign the same thing? Mother Benz knows best...

__________________
Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)