I need to replace the blower motor in my 1990 300SEL. I found a new one ( with fan) online at a reasonable price. After researching the forum I thought it seemed simple enough to do myself. I dropped the under dash cover on the right side expecting to see the motor but could not. I saw a black tube about 4"-5" diameter going to the right side of the dash from the center. My car is an air bag model, if that makes a difference. Where is the motor located? Am I wrong about the "simple enough to to myself" part?
Thanks for your help-
Ken

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1990 300 SEL