BRENDA PRIDDY & CO.The 2010 Cadillac CTS coupe will faithfully follow the styling cues seen on the concept that debuted this year at the Detroit auto show. The photo of this CTS prototype was snapped last week. Tape camouflages the taillights, which angle up and come to a point near the end of the trunk lid. The production coupe appears to be 2 inches taller than the concept. Sales begin in the second half of 2009.