Rusnak Mercedes-Benz of Arcadia, one of the largest dealerships in the nation at 250,000 square feet, held its grand opening recently. Those in attendance included Rusnak Chairman and CEO Paul Rusnak; President Victoria Rusnak; Mercedes-Benz of Arcadia General Manager Brian Beatt; Rusnak Vice President Liz Rusnak; and Dietmar Exler, CEO and president of Mercedes-Benz USA.