I am going to be removing the MC to replace the MC to booster seal on my W123. Ive never done any brake work before...

What is the size of the 'plug' that needs to go into the MC steel line receptacles?

Better have them now than to have to test fit a bunch with paint eating brake fluid spilling everywhere :-)

Thanks,
dd

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car