What does 'demons in the snow' mean in the following context?
The E30 generation 3-Series is a classic design that has yet to truly grow old. Many consider this generation of 3-Series to be the quintessential BMW. It is also a great car to learn how to drive in. Most are rear-wheel-drive and are equipped with a manual transmission, making them a true driving experience.
There are all-wheel-drive variants available as well that are just demons in the snow. The engines are very reliable and once again, like the Mercedes, fairly inexpensive to repair.