On June 4-8,2014 I was in Charleston, WVa and rented a mid-size car from Hertz. I am a longterm client, gold level. I have always had excellent experience with their vehicles. this time they gave me a Chevrolet Spark. The car was sufficient for my needs. However, my family lives on the top of a mountain. This car quit - engine running - but would not move at one quarter of the way climbing the mountain.
Ultimately, rolling backwards, and starting slowly, with full speed acceleration we were able to make the climb.