has anyone ever replaced all rubber and plastic lines on their 560 SEL? I am talking about the lines that runs ( most of them) on top of the engine. I notice that the white plastic lines are becoming brittle as they age. I thought it would be a good idea to replace all of them as a preventive action for potential problems like vacuum leaks....

Is there a kit that would cover all of them? or is there a list with part numbers that you can share...i really would appreciate it.

thx,
emmy