Surprisingly, I think that the new Cayenne will sell better, at first, than the Panamera in Germany. I wouldn't bet on it but looking at the new Cayenne, it is definetely an attractive product, especially in the lower power range where the interesting prices could attract many customers. I also think that the Panamera base models could sell much better than the S or the Turbo, simply because even the 300 HP version is pretty fast and the price tags more attractive.
I'm no marketing expert, I can only express my personal feelings and observations.
A lot depends on the german media: if they start to portray the Cayenne as a modern and fuel efficient new product, this could help. I still have my doubts though that this is going to happen.
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RC (Germany) - Rennteam Editor 997 Turbo, BMW X5 M (03/2010), BMW M3 Cab DKG, Mini Cooper S JCW