Mercedes w204 HVAC motor flap dashboard clunking sound.

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Mercedes cozy

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Aug 6, 2006
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Location
LONDON (Near Heathrow Airport)
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Mercedes ML 320 CDI W164 KEYLESS GO / (NOW WITH STAR)
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Hi all

I have a w204 Mercedes 2008 C220 cdi and the flap inside the HVAC system is intermittently flapping around causing a clunk sound behind the glove box.
Picture is taken from engine bay side with air box removed.
I’m guess the motor that controls the flap would need changing and would this be a dashboard out job?
 
View attachment 129106
Hi all

I have a w204 Mercedes 2008 C220 cdi and the flap inside the HVAC system is intermittently flapping around causing a clunk sound behind the glove box.
Picture is taken from engine bay side with air box removed.
I’m guess the motor that controls the flap would need changing and would this be a dashboard out job?
Problem solved.
Turned out to be the stepper motor faulty on the far left of the inside of dashboard. Only had an inch gap to remove 3 torx 20 screw.
Old stepper motor had a broken joint inside.
I used an adjustable wrench and small torx 20. No more clunking inside the dashboard.
 

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