She does mean it - my personal charm and charisma never fails with Mrs MSS.
She has actually said that I can have a Sportbrake XFR-S or CLS63 provided we also have a family beech-hut on Felixstowe seafront.
So it's a decision on whether I get a CLS 350 now or wait a couple of years and get the XFR-S or the CLS63.