Yes I would say the fault blew your ground path for the tach/clock module. The GP light also gets its ground from the metal housing of the tach/clock, unlike all the other bulbs that have 2 wire sockets.
The ground for the tach/clock has to get across to the fuel-oil-temp module, and goes out on pin 1 of the circle connector to the main ground point behind the cluster.

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The OM 642/722.9 powered family
Still going strong
2014 ML350 Bluetec (wife's DD)
2013 E350 Bluetec (my DD)

both my kids cars went to junkyard in 2023
2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles)

1998 E300DT sold to TimFreeh
1987 300TD sold to vstech