For starters the diesel engine sounds like a tractor especially at low speeds, it follows ruts in the road when trying to drive in a straight line, it has the most uncomfortable leather seats out of any car I have ever driven. (carbuyer.co.uk)
The tires are also larger than the Revolution making it easier for both jogging and for going over rocky paths and muddy ruts in the road. (stroller-envy.com)
The GLC displayed impressive ability, at one point climbing a hard - packed 33 - degree grade (and descending at a similar angle) and showing impressive articulation while scrambling through a section of staggered, deep ruts in the road. (automobilemag.com)