The X1 18d M Sport stands out with its low CO2 emissions, indicating a more environmentally conscious choice compared to many vehicles in its class. This, combined with its excellent fuel efficiency, means you can enjoy the driving experience and the versatility of this BMW SUV while being mindful of running costs. The combination of its performance, practicality, and efficiency makes this 2018 BMW X1 a compelling option for those seeking a well rounded premium vehicle.