Hi everyone,
W215 CL600 TT
The fuel pump had always had a whine since purchase, so took it into Mercedes over here who diagnosed new pump + filter needed, so had them replace in February. Not cheap.
Sound didn't go, so took it back last month. They say the pump & filter is fine and proposed to drain the fuel tank as perhaps the filter at the bottom was blocked.
Have done this and ..... noise still there.
They now say there is too much pressure in the fuel system (7 bar v normal 3.5 bar) and need to look further.
Any thoughts? They say the pump is whining as it's having to work hard to deal with a blockage ......... presumably now, that's further up the line ..... anyone had a similar problem, please?
Thanks,
Stuart
W215 CL600 TT
The fuel pump had always had a whine since purchase, so took it into Mercedes over here who diagnosed new pump + filter needed, so had them replace in February. Not cheap.
Sound didn't go, so took it back last month. They say the pump & filter is fine and proposed to drain the fuel tank as perhaps the filter at the bottom was blocked.
Have done this and ..... noise still there.
They now say there is too much pressure in the fuel system (7 bar v normal 3.5 bar) and need to look further.
Any thoughts? They say the pump is whining as it's having to work hard to deal with a blockage ......... presumably now, that's further up the line ..... anyone had a similar problem, please?
Thanks,
Stuart