Author Topic: Brake Fluid  (Read 114 times)

hamidagha

  • Enthusiast
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  • Posts: 38
  • W116 Enthusiast
  • Location: Birmingham UK
Brake Fluid
« on: 10 June 2021, 04:33 AM »
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

  • Classic
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  • Posts: 141
  • W116 Enthusiast
  • Location: Netherlands
Re: Brake Fluid
« Reply #1 on: 10 June 2021, 05:01 AM »
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 (Dad's)
1975 W116 280 S (Dad's)
1975 W116 450 SEL 6.9 #140 (Dad's)
1977 W123 230 (Mine)
1992 W124 230 CE (Mine)

hamidagha

  • Enthusiast
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  • Posts: 38
  • W116 Enthusiast
  • Location: Birmingham UK
Re: Brake Fluid
« Reply #2 on: 10 June 2021, 05:30 AM »
Thanks Max, that is really useful.

adamb

  • Vintage
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  • Posts: 630
  • 1977 450SEL6.9
  • Location: London, UK
Re: Brake Fluid
« Reply #3 on: 10 June 2021, 02:35 PM »
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.