I did the same thing (SLS line repair) with the same tool. Trial & error finally got it done for me. Did you order the metric replacement hydraulic line, too? I had to mail-order mine. Good luck!

__________________
1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)