In this video, we walk through diagnosing and replacing the air suspension valve block on Mercedes-Benz W212 E-Class and C218 CLS AMG models. You'll see a practical demonstration of identifying valve block failure symptoms, learn the quick diagnostic method using airline swapping to distinguish between valve issues and air spring leaks, and follow along with the replacement process. We also explain why simultaneous compressor and valve block replacement is recommended to prevent future system failures.