general problems of the 2003 Mercedes Benz CLK320

I own a 2003 Clk320 coupe. Yesterday, I took my car into fresno mercedes and was very disappointed with my treatment. The upper driver's seat is coming apart and the service manager said it was a defect. Things changed when they realized the warranty had recently expired and the extended warranty did not cover the defect. It suddenly became a "gotcha" situation and unpleasant. I understand warranty expiration, but do not understand rude attitude. I was not even give the number of who mercedes uses to repair "defects" there are two mercedes in this household and BMW is looking better all of the time.