Mega thanks for your replies: it's always v. interesting to hear about all the intricacies .... & tx for mentioning the Servicing & Service FAQ article - which I have read & was very clear about the principles, but may not altogether cater for what happens in practice, which is what I'm trying to find out - bit of a baptism by fire ! WIghty: the quote I got was in fact from Wayne Gates & surprised me as it came out more expensive than going to an MB dealership (if you take into account the 20% off for taking out a Service Plan), hence my question. I've also come across another question, about torque converter fluid change (which I thought came under 'B' service - if at all) but I think the convention is to post that on a new thread?? Anyway, all your views are, as said above, very interesting ... am become a Keyboard Warrior Nerd !