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• Aston Martin's quiet partnership with Mercedes-AMG offers a glimpse into how small luxury car makers depend on larger ones to survive — It's far more complicated, and more expensive, to manufacture a modern automobile than most of us could ever imagine. This is doubly true for those scratching out an existence at the ultra-luxury margins of the industry, where development costs are rarely ever recouped by volume sales and product decisions have almost zero margin for error should they not connect with the core group of buyers — whose support is key to keeping the lights on.