Glad you got your problem solved. My lower harness (300E) did the same thing a few years ago, and the dealer doesn't stock a replacement. So I MADE a new one.

In my case, the bare wires shorting out on occasion ended up ruining the oil pressure sender, so I had to replace that too.

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car