My 540i functions normally when I am driving slow, but when I drive it more than a quarter throttle the revs spike and the acceleration does not match. It feels as if I am feathering the clutch when my left foot is completely off the pedal. As I let up on the gas the engine seems to catch up with the rpms. It struggles at times on medium sized hills with the same problems. There are no wierd, noisy sounds when shifting gears. Can you help?
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