DIY - 2014 Opel Corsa D 1.4: Change the F17 manual gearbox oil (transmission fluid)

This is a guide on how to change the oil in an F17 manual transmission on a 2011-2014 Opel Corsa D. The oil that I've removed was a Febi 32590 75W90 GL5 that matched the old GM specification for F17 boxes, 1940768. The new oil that I've added is a Ravenol MTF-3 75W that matches the latest GM specification, 1940004. The new oil made the gear changes (in particular gears 1 and 2) much smoother, especially during cold starts. I had hoped to be able to remove the old oil using a 12V oil pump, but that turned out to not be possible. Subsequently, I had to remove the differential cover, allow the old oil to drain, then install the cover back with a new gasket. This method drains about 1.1 - 1.2L of oil out of a total capacity of about 1.6L. In the future, I'll replace the oil through multiple drains and fills, using the level plug as a drain plug. Disclaimer: This video was made in the hope that it will be useful to other DYI-ers that work on the same vehicle model. The author of the video is not responsible for any kind of personal injury, property damage etc. that may arise if anybody tries to perform the same job on an identical or otherwise similar vehicle based on the contents of the video. Every DIY operation performed on your vehicle poses direct or indirect safety risks to you and those around you. Before attempting any such DIY job, please make sure that you have all the necessary tools, support and confidence to see it through successfully.