BenzWorld Senior Member
Date registered: Aug 2013
Vehicle: 2003 SL55; 2011 E350 BTC
Location: Battle Ground, WA
Mentioned: 4 Post(s)
Quoted: 71 Post(s)
FYI - conventional wisdom says there is a possibility the hose burst because the accumulator your finger is pointing to may be blown.
That accumulator takes the pressure pulses from the pump and dampens them out. If it is blown, the pressure spikes then go to the line that burst, and it eventually fails.
That is why it is a good idea to replace this accumulator at 10 years or 80K miles. Any longer and you take the risk of blowing a hose.
The only test I know of for the accumulator is to press a pencil (or screwdriver) in and see how far it goes in. If very short insertion, it is good; if bad it goes way in, and shows the diaphragm is not holding pressure. You could easily remove it when doing the hose to test it.