MOSCOW, Dec 5 (Reuters) - President Vladimir Putin on Monday drove a Mercedes across the Crimean Bridge linking southern Russia to the annexed Crimean peninsula, less than two months since an explosion tore through one of the Kremlin chief's showcase infrastructure projects.Putin, accompanied by Deputy Prime Minister Marat Khusnullin, was shown on state television behind the wheel of a Mercedes, asking questions about where the attack took place."The left side of the bridge, as I understand it, is in working condition, but nevertheless it needs to be completed.The blast also destroyed several fuel tankers on a train heading towards the annexed Crimean peninsula from neighbouring southern Russia.Russia in 2014 annexed Crimea, which was transferred from Soviet Russia to Soviet Ukraine in 1954 by then Soviet leader Nikita Khrushchev and recognised by Russia in 1994 after the collapse of the USSR."