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I hear a clicking noise inside my 92 190e under the glove box can anyone tell me what to look for maybe a relay or something ??
 

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190e 2.6L
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297 Posts
I think it's the climate control vacuum...anyone can confirm?
 

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'86 190E 2.3, '08 RDX, '09 C63 AMG
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1,434 Posts
Mine clicks during startup and when changing temperatures. It is the switchover valves for the Tempmatic system. I bought a new unit and it is on my "To Do" list. Hopefully it will solve my occassional hot air coming out of the side vents during AC usage.
 

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1992 190E | 1997 BMW 328i | 2001 C320 | 2004 C230K | 2007 BMW 335i
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346 Posts
Same thing on mine. It recently started making that noise, and usually when the thermostat is in the 70-75 range and the car switches between slightly warm to slightly cool air. When it's hot out and I have the A/C on and the thermostat is low, it won't make that noise. It's one of those things I have to get to, but I'm a pretty big dummy when it comes to climate control related items.
 

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'85 2.3-16 '99 C280 '11 GLK350
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If the "clicking noise" is a constant chirp, then it is likely to be the aspirator motor/fan. As the motor ages, the bushing inside the 12v motor start to bind and emit a chirping noise, sort of a smaller version of the noise that older blower motors make.

Located behind the glove box, the small electric motor driven fan creates an air current via a tube that runs up the the nearby A-pillar that terminates near the climate control's temp sensor mounted up between the visors. The air current is used to get an accurate reading of the temp inside the cabin.
 
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