Hello my a/c compressor and clutch is spinning but blows hot air unless i press the ec button then cold air comes blowing 40 degrees at vent, works great after that, also manifold gauges psi low side is 80 until i press ec button then 45 psi on low side gauges on a 100 degree day, high side not working i ordered a new hose arriving soon, anyone know what could be causing that 2000 mercedes e 320 thank you for your help.