CORRECTED - Mercedes, Lexus top ranking of U.S. dealerships

(Corrects spelling of name O'Hagan throughout)

DETROIT (Reuters) - Daimler AG's Mercedes and Toyota Motor Co's luxury Lexus brand topped a ranking intended to measure how well U.S. car shoppers were treated in dealer showrooms whether they bought a new car or not.

The survey released by Monterey, California-based sales consultancy Pied Piper showed Mercedes and Lexus in first and second place followed by Jaguar, Saturn and Land Rover.

The study ranked 14 brands below the industry average, including all three Ford Motor Co brands -- Ford, Lincoln and Mercury -- and all three brands with Chrysler Group LLC -- Chrysler, Jeep and Dodge.

By contrast, three of the four brands that General Motors Co is keeping as part of the leaner operation that emerged from a federally sponsored bankruptcy scored above average -- Cadillac, Chevy and GMC.

Fran O'Hagan, study author and president of Pied Piper, said up to 90 percent of U.S. car shoppers now walk out of car dealerships without buying, making satisfaction with the shopping experience very important in a declining market.

Three of the four brands GM is dropping were below average including Pontiac, Saab and Hummer.

The exception was Saturn, the highest ranking non-luxury car brand. GM is selling Saturn brand and its associated retail network to Roger Penske's Penske Automotive Group.

O'Hagan said Saturn's approach showed its no-haggle pricing policy still resonated with core consumers. "I think Saturn appeals to a number of those buyers," he said.