I had a link in the same spot that had been repaired by the previous owner and it was leaking. I did a similar repair but I slightly flared the end of the line to help prevent the hose from slipping off.

https://www.youtube.com/watch?v=DUxHuh9JhEg&feature=youtu.be

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1985 Mercedes 300D bought for $400 work in progress. Video Playlist: https://www.youtube.com/playlist?list=PLeYmvdiw3Xm87mFck3FjQ12ZoTSFXZ0Rr