I agree with jcyuhn

I just had a problem with my 94 E320 with the A/C , air system recently. I had a blower motor quit out on me. I mention this because I read in the wiki that if the motor got installed backwards the blades are spinning in the wrong direction and low air flow would result. I ask if you had a repair recently?

If the blower hasn't been re-installed perhaps it just died and needs to be changed out. Trust me pay the extra and get the Behr OEM model replacement with squirrel cages. Other than this more info needed such as , "does air blow through the defrost setting?"

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