Knopf Automotive

Porsche has once again raised the bar for sporty four-door luxury cars with the all new, 550 horsepower Panamera Turbo S. Expected to debut for the first time in North America at the New York International Auto Show, Porsche's most powerful Panamera is sure to be a spectacular blend of ultra-high performance and first class comfort.

The engine for the Turbo S is based on the already proven and powerful twin-turbocharged V8 in the…

This isn't your ordinary Mercedes-Benz C-Class. M.I.R. tuners have claimed the fastest C63 AMG Mercedes-Benz ever to be built.

Your everyday AMG model is ready for a test drive at Knopf Automotive in Allentown, PA, but you won't find an enhanced vehicle such as this on dealership lots.  

On March 25th, with the help of driver Ben Scott, this Mercedes-Benz ran an all-time best of 10.41@135.27mph in the…