Anyone had a dealer 180,000km service on a T5?

[Tornado T5]

Had my T5 serviced last Wednesday 165K scheduled service although (actually done 173K as out of sync a bit) and the staff mentioned to me that the next service scheduled at 180K or for me 188K will cost approx $2,500 as it involves major work and time. In fact the serviceman hinted if I was thinking of trading in to do so before. Has anyone had this service done and if outside of a dealer could you share the cost please.

Edit: I think the gates couplings are parts needing replacement at 180K scheduled service.