Just wanted to share something with the forum that happened in our workshop today. Whilst carrying out the brake bleeding procedure on a W211 saloon ( after SBC pump replacement ), a brake line blew out !!!!! Rusty brake lines are well known/ documented issue on 211's but this was a first for me! We dropped the plastic under trays that run the length of the undercarriage and what we found was frightening. The lines at the union with the rear flexy hose didn't actually look too bad. I'm sooooooo thankful this happened in my wshop. Please guys check your rear brake lines if you can !!!!!!!!!!!!