Brake Fluid Reservoir Cap

[Jordan]

An easy question to which I do not know the answer.  Are the two (they are off white) outside brake fluid reservoir caps (the one with wires coming out of them on 280SL's) suppose to have a rubber gasket or some form of washer under the cap to seal them when screwed closed or not?  I can't find a picture anywhere that answers this question so if someone could have a look or knows please let me know.

Many thanks.

Marcus

[mbzse]

.../...outside brake fluid reservoir caps (the one with wires coming out of them on 280SL's) suppose to have a rubber gasket or some form of washer under the cap.../...

The black plastic parts (cylinders) to which the wiring is attached has a groove on their perimeter, in this groove goes a rubber seal ring (O-ring).
/Hans in Sweden

[Jordan]

Hans, I am not sure that is the same reservoir.  The caps I am talking about are the bottom two you see in the picture below.  I'm not sure if there is an o-ring or rubber gasket that goes up inside the cap. Ignore the reservoir you see in the picture,  I am talking about the 3 cap type with those white caps on each end and a black cap in the middle.

[mbzse]

../...I am talking about the 3 cap type with those white caps on each end and a black cap in the middle

You wrote "the one with wires on 280SL´s"; so that type is what my reply refers to
/Hans in Sweden

[Tyler S]

No there is no washer or o-ring on the 2 caps. They are just there to hold the electrical float housing down into the reservoir.

[Jordan]

Thanks Tyler.  Saves me from having to look for washers or o-rings.