A Mercedes Benz dealership has secured the final approval from Danbury's land use agency to relocate from Federal Road to Miry Brook Road.  Pioneer Realty LLC/Steamboat Motors LLC was approved by the Zoning Commission Tuesday night for a certificate of Location Approval for a Motor Vehicle New Car Dealer’s License.  The area has other high-end auto businesses.  The 31-thousand-square foot, two-story dealership with rooftop parking and 22 service bays would have 250 parking spaces on site. As part of earlier approvals, Curry Automotive was required by the City to install camera detection equipment at three nearby intersections to improve traffic management and signal operations.  The company agreed to pay the City 50-thousand dollars to buy and install the equipment.  Zoning variances, wetland approvals, and Federal Aviation Administration clearance were granted.