Ewing Buick GMC Bought a used Mercedes with 33,000 miles that needed $5,473 of repairs within 150 miles after purchase. Plano Texas

Bought a 2007 Mercedes S550 with 33,000 original miles from Ewing Buick GMC. Was told by the sales person that the car had been thoroughly gone over including an engine diagnostic test and that everything came back indicating no problems. After driving the car for less than 150 miles the engine malfunction light came on. An authorized Mercedes dealer informed me that the car required $5,473. of engine repairs. When contacting the sales representative, sales manager and General Manager all informed me that I bought the car "As Is" and there was nothing they could do. So the car was misrepresented to me by Ewing Buick GMC and I was lied to by their sales person.