You can remove the radio to get to the wiring harness without having to dismantle the console. In mine, there are two horizontal slots on the head unit. A slim flathead screwdriver inserted into each slot will remove the head unit to gain access to the harness.

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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