what are the two little black "pumps" for on the brake fluid reservoir on an 1982 300D?

I believe you press on them to test the low fluid circuit. Or in my case, they are there to gush out brake fluid if I try and use a power bleeder.

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

I wondered what those things were too. When I used the power bleeder on my SDL they leaked fluid out pretty badly. I figured one of these days I should figure out what they were.

__________________
Keep everything as simple as possible-but no simpler--Albert Einstein

well brake fluid is leaking around the front brake caliper. I had to put more fluid in the other day and the brakes have gotten a bit mushy. maybe theres air in there or something. anyway im replacing both of them this weekend so hopefully that and the resulting bleeding will resolve it. I just wanted to know if there was a quick fix to tighten them up temporarily.

n/m I ran it a bit and it went back to normal.

those 'pumps' are the brake fluid level sensors. Yours are cracked if they're leaking, just replace the black caps, but check first as there are two kinds, one with a center stem and one without.

__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350