According to some Haldex bumf I have very recently come across the filter and oil on the Haldex unit should be changed every 20k miles, can anyone confirm this please. If this is in fact the case would I be correct in assuming that the Skoda garage (Grey Gables Witney) that undertake my servicing should have flagged this up to be done? They didn't flag it up and the work hasn't been done and the Yeti has done 31k so far and I just wonder that in the event that the unit failed due to poor main