The climate control system in my 1994 E320 wagon doesn't wait until the engine is warm anymore before turning on the blower for heat. Further more, when I depress the windshield defrost button it blows at high speed regardless of which fan speed button is pushed. Is this the way it is suppose to work? Also - does anyone know of winter blades available for the monowiper on this car? I got tired of the wiper arm bridging the windshield and causing visibility problems while driving in the snow. My dealer says he hasn't heard of any available.