Mercedes ML 350 W166 Battery Replacement

This is my attempt at helping someone who wants to know how to change the Main Battery on a Mercedes ML 350 W166 2012 Model. For a couple of months my ML350 W166 Diesel Bluetek 2012 SUV did not want change from Park to Drive on first startup. To overcome the problem I first used to turn the engine off, wait for the instruments to stop displaying and then start again. This worked fine for some time but it became worse. I had tried to find information about this on various forums and on YouTube but had not much luck. People suggested that this was caused by the Auxiliary battery which is located in the boot and very difficult to access. I did replace it first but it made no difference. Recently the temperature here in Sydney Australia had dropped significantly to a mere 5C in the morning. This severely impacted the starting up procedure and this let me to believe that it must have something to do with the main battery. Hopefully this video will help people who are uncomfortable or uncertain about the process. It took all up about 30 minutes from start to finish. The tools I used were: 10mm socket with extention 13mm socket with extention Flat bladed screwdriver Ratchet Scissors Contrary to what I have read on various posts, I did not have to reset the car ECU after the battery replacement. The only things I lost were: Time (which reset via satellite once I re entered the location) Passenger Side Mirror Dipping for reverse. (This came back after turning the...