I am having similar problem with my 87 560SEL (very minor leak) and has to be fixed. The pressure hose on the 560 is really hard to get to since it's snaked around and behind the main pulley, water pump and other stuff. I am not sure about your car, but mine is a ***** to get to and I have not yet found an easier way to remove the hose without removing the main pulley and other stuffs. Maybe there is no other ways.
I posted a thread regarding this issue and no one has yet to reply.
