cheers for the further replies cheers, has anyone got a pic of the breather at the rear of the motor that you say might be blocked ?
i tried looking around for a breather first before laying under it but i couldn't see one.
never tried diff lock to see if the light on the dash works but it passed the mot last week so i guess the reversing light works.
i really must check these things .... !
If its the 2.5TD - may be worth removing the pipe from the oil filler to the air filter box to check it is not blocked as well, as this will cause a build up in crank case pressure, and blow oil out of the other breathers.