Not worth much, IMHO.

That must certainly be an early M116 in there. The M117 5.6 in the S-Class typically has the dual snorkel intake and black valve covers.

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)