Our QRH A-333 says in the chapter "overweight landing":
"An overweight landing is authorized up to MTOW.
Automatic landing is certified up to Maximum Landing Weight (MLW). Autoland flight tests have, however, been successful up to 229 tons.
Depending on the situation (e.g. emergency or other) and provided that the runway is approved for automatic landing, the flight crew can decide to perform a autoland up to 229 tons."
In my opinion you have to have a good reason to conduct a AL with overweight - i think it wouldn't be good airmanship to try it on a CAT I ILS with an offset LOC...