Last year, London 2012 was unable to advertise during the race because bids were banned from promoting their campaigns internationally.
However, this year the bid has a major presence at the race, with flags down the finish straight on The Mall and boards and banners at key sites along the course such as Tower Bridge, Canary Wharf and Parliament Square.
Redgrave, the bid's leading sporting ambassador, will also run the marathon with the bid number 2012.
Bid officials will be hoping Paula Radcliffe can win on her home soil after the disappointment of last year's Athens Olympics, as the story would generate huge worldwide interest.
Livingstone said: "Marathon day will mark just 80 days to go until the IOC make its decision on which city will host the Olympic Games and Paralympic Games in 2012.
"London's marathon - the world's greatest race, passing the capital's iconic landmarks - perfectly showcases the UK's passion for sport, and just what an exceptional Games we would host in 2012."
The Berlin conference, which runs until next Wednesday, is expected to attract many of the IOC members, who will vote on 6 July at their meeting in Singapore.
