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2003 ML350
181 Posts
Discussion Starter · #1 ·
The air vent in my 300 SE allways made a loud thump when I pushed the heat button. One morning it made a louder noise and from there on hot air only came out the AC vents not the upper ones. In addition outside air comes in when no heat or AC button is engaged. I suspect a vaccume actuator link either poped or snapped. How difficult is to get under there to investigate and repair? Any pointers?
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