What does this do?

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cpg003
Dernburg Wagon
Posts: 8
Joined: Fri 06 Apr, 2018 8:34 am
Model you own: w107
Region: Western Australia
Location: North Perth

What does this do?

Post by cpg003 » Mon 11 Jun, 2018 10:14 am

Morning all,

Can anyone give me some clarification of what this is and what it does? It’s mounted underneath the coolant reservoir of my C107 and has two vacuum lines and an electrical connection attached. Thanks in advance.

Ignore the writing on this one, just a pic I found on eBay.
Pierburg Vientil pressure regulator DB2097 ZK 12982 8171
76F15FF3-A1F6-4F92-8CAA-FE2350225281.jpeg
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1979 450 SLC - C107 - Milan Brown
2017 220d GLC - W253 - Polar White

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John Green
OZBENZ Admin
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Model you own: w112
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Re: What does this do?

Post by John Green » Mon 11 Jun, 2018 7:49 pm

Idle speed adjustment when the A/C compressor cuts in. It interrupts the vacuum to the ignition distributor.
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cpg003
Dernburg Wagon
Posts: 8
Joined: Fri 06 Apr, 2018 8:34 am
Model you own: w107
Region: Western Australia
Location: North Perth

Re: What does this do?

Post by cpg003 » Mon 11 Jun, 2018 8:57 pm

Thanks John. Much appreciated.
1979 450 SLC - C107 - Milan Brown
2017 220d GLC - W253 - Polar White

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