Hi not sure on mine it is at the top of the box near the front and if i mind correctly its a 17mm socket that you will need to open the plug i know i have to go to Renault to have my oil level check but some of the older espaces they have another plug at the front of the box half way down the front so when you are filling it up from the top when it starts to run out at the front plug when its removed with 17mm socket you will then have your level but i may be wrong i do not have this front plug because mines is a auto box and as i said Renault need to take my level and check what temperature its running at as well i hope this helps Donald.