design fault

I have a leak in the air-con system. This leak is at the input valve, just in front of the main radiator. I have charge the system about 4 times and used stop-leak once. The dealership have offerred to fix it but cannot give a fixed price. The problem being a design fault - the condenser block...

I have owned three Mercs from new, the first two were fine and trouble-free, but my, how the quality has deteriorated over the years! My latest car, an E200, failed its MOT after just 18,168 miles because the two front lower ball joints had worn out! Have you ever heard of such a thing? If...