Yellow Check Valves 280CE w123

1976-1985: 230T, 230E, 230TE, 230CE, 280E, 280TE, 280CE, 240D, 300D, 300CD, 300TD,
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Martyn 280CE
C Class
Posts: 25
Joined: Sat 17 Mar, 2007 11:30 pm
Model you own: w123
Region: New South Wales
Location: Sydney Northern Beaches

Yellow Check Valves 280CE w123

Post by Martyn 280CE » Wed 21 Feb, 2018 11:54 pm

Hi I used to use this forum a lot.and still have my 1984 280CE W123 - Vin Number WDB1230532A2180

I have had no issues until now...and am going to be doing a few jobs I have ben putting off.

My car failed rego For the first time in 15 Years due to seat not locking - I believe an actuator is leaking on the passenger seat.

I also noticed very quickly that the yellow vacuum valves and the six way rubber were very tired and hard while checking so I have ordered and received the today and was led to believe that al four were different.

My question is how do I know which is which of the four.

Ac / Seat Lock / Door Lock / Headlamp Adjust

Or are they actually all the same.

Thanks for your help.

1984 280 CE
Sydney, Northern Beaches

Posts: 1033
Joined: Sat 25 Apr, 2009 9:32 am
Model you own: w123
Location: Melbourne, Vic

Re: Yellow Check Valves 280CE w123

Post by tsharkey » Thu 22 Feb, 2018 6:09 pm

Blue for seats
Yellow for CL
Purple for Lights
Green for AC
Grey for Vacuum Gauge
Red for extra vacuum tank in LH guard
Brown for Fuel Shutoff (Diesel)
Black for Vacuum modulator related for auto trans

The two way check valves are all the same. Easy to test (on the 2 pipe side, with one blocked, does the other hold vacuum) - I have never replaced with new, simply got a box of spares off wrecks and replaced at most 2 over the years. Some have inline check valves but the seats wont, as they want to loose vacuum as soon as they can

If it is only 1 seat, it is not the valve on the doors that release the seats. So it is either the valve on the side of the seat or the actuator underneath. If it is the actuator, have to take the base pad cover off to remove the actuator. The actuator itself is generic, it is the locking mechanism it pulls that is specific to the seat.

Hope that helps.
W123 1981 300TD - Family Kid mover
W202 1998 C250D Factory OM605A Turbo - Partner's daily driver
W123 1982 300CD Retro fitted OM617A Turbo - Mine
W123 1984 300TD English 5 Speed Manual
W123 1982 300TD Factory OM617A Turbo (Hans) - Project
W123 1982 300D - OM617 NA (Hektor) - Son's
W123 1985 230TE - Brother's
W123 1985 300D - Sister in Law's
1962 S-Series Valiant (Tho Daimler & Chrysler divorced, still part of the extended family)

Past benzes
W114 1969 250CE - PO put in an M110 transplant and nearly sent me around the bend
W123 1981 300TD - "Matilda" - RIP hit front side & rear but left my brother + niece A-OK

Current Projects
Coupe restoration, Turbo Wagon freshen up

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