Installation on the brake line setup in the mercedes 190
i used 4,75mm or 3/16inch brake line from
this is copper/nikkel/steel line and is very corrosion resintant,
more then steel and copper alone.
this is alittle more expensive but last a lot longer
also this line is just like copper easy to move in position and with a hand flare tool to use to create flare connections
if there are any questions please let me know