You might think that the Mercedes-AMG CLA 45 S experience would be dominated by the engine, but the agile and engaging handling are key to its appeal. It's pricey – but such talent comes at a cost.

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You might think that the Mercedes-AMG CLA 45 S experience would be dominated by the engine, but the agile and engaging handling are key to its appeal. It's pricey – but such talent comes at a cost.