Porsche is top of the influential US J.D. Power and Associates 2010 Initial Quality Study - but the results make disappointing reading for most European brands.
The J.D. Power study measures owner complaints after approximately 90 days of ownership.
See the full US J.D. Power and Associates 2010 Initial Quality Study results chart
Aside from Porsche's success and Mercedes's top-five ranking, European manufacturers suffer a poor showing. Most notably Audi, BMW and Jaguar are all lagging below industry average and Land Rover was the lowest-rated of all brands included.
Toyota took a severe tumble, falling from sixth a year ago to 21st as a result of its quality problems and subsequent recalls.
Lexus, however, remained in the top five, while the Lexus LS notched up the industry-best score for an individual car.
Ford also became the first Detroit car maker to enter the top five.
