Unless you have problems walking, I would certainly do that if you arrive at the L gates too. I find it both faster and more pleasant than the automated transit. In any case, Goldorak already gave you perfect information on all aspects of your question so you now have all it takes for a pleasant and smooth transit, which it should frankly be considering the 1h45 connection time. Your flight will be one of the first ones to arrive at 2E so if you are reasonably fast exiting the aircraft, immigration and security should be reasonably fast.