I agree, they won't be able to demonstrate their costs. They will naturally have more costs than an Independant, so that will be a factor. For example, all BMW dealerships have to look the same, they have to lease off BMW, they have to have show cars, they have to have tea and coffee, they have to have a plasma tv... They have to have a lot of things, which will bump the price up without increasing the level of service.
I also agree that 95% of Z4 buyers will be looking for a BMW service history, and that it'll bring the price of your car down when you sell if you do go Indy, but then you've saved on the Indy costs anyway.
I honestly don't think the servicing costs are too high, with my highest service cost on my 3.0si being £350, and that only comes every EIGHT years!
I also agree that 95% of Z4 buyers will be looking for a BMW service history, and that it'll bring the price of your car down when you sell if you do go Indy, but then you've saved on the Indy costs anyway.
I honestly don't think the servicing costs are too high, with my highest service cost on my 3.0si being £350, and that only comes every EIGHT years!