My W203 C270 (2001) blows cold air from upper vents and hot air from lower vents whatever temperature I set it. I filled A/C gas some 2 years ago, so it might be low pressure now, but I'm not sure if this is a symptom of low pressure. Any help thanked a lot.

 

If some cold air (colder than outside) comes through the vents, the AC is working. Are you able to direct where the air goes? (face, feet, windshield etc.)

 

Yes I can, but there's still enough hot air on feet when I direct it to windshield.

 

I replaced the console and everything is fine now.