Unimog Club UK

Welcome George nice 120 you have regarding your difflock seals there easy enough to do front one is tricky and ungainly use a pipe clamp to ascertain if both are leaking or if your lucky just the rear.
She has little mileage this will be the issue moisture in the difflock will of accumulated and rusted the cylinder so damaging the seals.
Moose

Cheers Moose, unfortunately both leaking you can hear it at the breathers and niether engage any longer . Never mind not the end of the world I am an ag engineer so won't be out of my league and have a workshop......it's just finding the time!

 Casto you've got to drop the top, only take 2 mins and even better the windscreen fold down in a minute (Sooo much better than landy set up) and get some flies in your teeth!