That link is for the E class W210. His is different (but similar). Those codes are right for his car.

Current sensor values: Set temperature wheels to white area. Igniton ON. Press left and right AUTO button. Wait at least 20 seconds then press REST for >5 seconds.

Scroll with left AUTO button to read current-sensor values. Write these down.

E045 is "refrigerant pressure sensor (B12), short circuit"
E075 is "Coolant circulation pump (A31m1), open or short circuit"