Superb II - "Product Recall"

My Superb II was in the dealer today for a Product Recall that I'd been putting off since the beginning of June, as I was told it was to check Parcel Shelf fittings.

Well, after a reminder in the form of a First Class "Signed For" letter, I decided I'd better book the appointment, and at the end of its checks today I was told it was nothing to do with the parcel shelf, where had I got that idea from...? (duh, YOU phoned me!)

It turns out its some sort of Engine Management or Control software upgrade and (to quote the service guy)... "We've done half of it, and will call you in a couple of weeks".

What's this all about? Does anyone know?

I'm not especially worried, more mystified about a "half-done software upgrade"!

Puss