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Brake Fluid

Started by hamidagha, 10 June 2021, 06:33 AM

hamidagha

Hi All
I plan to do my first ever brake fluid change on my 1979 280SE, and I note from the forum that DOT 4 is the correct fluid.
My question is, if 1L is enough, or will I need more?
Thanks
Hamid

Max-NL

Brake system has a capacity of about 0.5 litre. I personally always buy a bit more than 1 litre (usually 1,5 litre) just so that i can thoroughly flush the system.

One tip that I can give is to invest in an power bleeder for brake/clutch systems. It contains a reservoir in which you fill the brake fluid, and has a cap which screws onto the brake fluid reservoir. You then put the brake system under pressure which forces the fluid out of a caliper when you open a bleed nipple. Really helpfull if you're alone.
1971 R107 350 SL
1972 W108 280 SEL 3.5
1975 W116 280 S
1975 W116 450 SEL 6.9 #140
1977 W123 230
1992 W124 230 CE
2001 Ducati Monster S4

hamidagha

Thanks Max, that is really useful.

adamb

I have an earlier version of https://www.tooltruck-uk.com/drivetrain/brake-system/brake-bleeding/automotive-tune-up-and-brake-bleed-kit-detail (available in other shops also) that I've used for near 20 years across all cars owned by me or members of my family. Trouble and error free brake bleeding. Save yourself hassle and invest.