first car i have had that has passed the MOT first time so big thumbs up to my 1994 W124 E300d multivalve i had 2 things that the guy pointed out to me which either he let me off becuase not serious yet or put as an advisory. 1. rear break pipe rusting. small section of the brake pipe starting to corrode and lost its covering. not serious yet. he told me to cover it with some thing but wasnt clear on how and with what. how should i do this? is it best to get rid of the surface rust with wire brush and wet and dry or should i leave as is incase i take too much off and cause it to leak. What should i cover it over with? only a small area so dont want to buy a whole tub of waxoyl. 2. ball joint on front drivers wheel. when turned to full left lock can see a connecting rod to the wheel hub with a ball joint when looking from the 9'o'clock direction of the wheel. the rubber was split exposing the joint. i think he said this was called a crack/crank rod. is it clear what joint im talking about? i can take a picture. what is the procedure to change this and where should i get the part?