If you've gone this far, why take it to the most expensive repair shop on the planet? A good independent shop should do a good job repairing the wiring harness for a lot less. The dealer may say you need a new wiring harness - no repairs. They're weird like that.
E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel.
Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more...
E28 M5 w/ buncha stuff, R171 SLK350