Sport mode is much better than C mode, faster throttle response and holds the gears longer. I find that S mode is much better for fuel consumption, as C tries to keep as smooth a ride and as low revs as possible so changes early.
the difference between comfort mode and sports mode is that comfort mode accelerates from second gear and therefore, has a smoother, more subtle acceleration and also saves gas.
The owners manual also states that the car shifts into higher gear earlier when in comfort mode. In sport mode the car will hold each gear longer.
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