C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

to plug or not to plug....part ID

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Old Oct 23, 2015 | 06:04 AM
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w203 c200 k
to plug or not to plug....part ID

Hi all,

Thank you for coming to the post. So i noticed a cable floating around in the space, left of the battery.

Then i noticed where it plugs into, see pics,

but questions arise.

1- what is this cables/parts purpose?

2- why is it disconnected? Did a dealer disconnect it or did it fall out ( unlikey ) but possible ?

3- should i plug it it......



This picture shows the area. Battery below, air filter above taken off to reveal where the cable ( in other pic) connects.<br/><br/>Top center of pic is the part im requesting identification....and info too thanks





Here is the cable, has 3 wires wrapped, blue, brown and other. Coming from the space directly behind it. Firewall/ bulkhead area.





Close up. Anyone know it functions?
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Old Oct 23, 2015 | 06:24 PM
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w203 c200 k
Thank you for the reply, anybody know the awnser ?
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Old Oct 23, 2015 | 11:46 PM
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Holmes5518's Avatar
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From: Northwest Arkansas
2016 C450
It's the air pollution sensor
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Old Oct 24, 2015 | 12:45 AM
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w203 c200 k
Thanks for that.
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Old Oct 24, 2015 | 02:10 AM
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Russell Ormerod's Avatar
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not a merc
Yep plug it in. Air sensor used for climate control
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Old Mar 31, 2016 | 09:31 PM
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From: WNY
2005 w203 C230
Can you please post a picture of your HVAC climate heater controller in the center console please?!
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