Rather than telling dealers how to fix the problem (upgrade software) just tell them to fix the problem. How they accomplish it doesn't matter. If they can't fix it that's another story.

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Porsche 996 Turbo (Ruf 550)
Porsche 993 Cab.
Porsche 997 GT3
Audi A8
BMW X5 4.8 White, Black Napa, Sport, Technology, Premium, Prem. Sound, Cold Weather, Rear Climate, Multi-Contour, Sirius, HD Radio, Running Bds., Bamboo