W203 coupe ticking

WindyH

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Joined
Nov 3, 2007
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Location
Warwickshire
Your Mercedes
E220CDI estate
W203 coupe ticking from dash

Have a facelift 54 plate c180k coupe, auto.

Has developed a ticking, audible inside the car at tick over (no pun intended!) or at low revs. Does it stationary or moving, in P,N or any gear.
Does it with climate off/manual/auto with controls in any position so don't think it's a stepper motor for that. However disappears as soon as brake pedal is pressed, then returns a few seconds after pedal released. Sounds like an old clockwork alarmclock and comes from behind speedo area on dash. Can't hear anything under the bonnet though. Could it be anything to do with vacuum or brake servo?

Any ideas appreciated
 
Last edited:

television

Always remembered RIP
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Mar 14, 2005
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Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Sounds like an flap sensor motor sticking to me
 

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