To gain access to the gearbox filler plug the air cleaner box needs to be removed.
Begin by disconnecting the MAF sensor plug and use a small screwdriver / snipe nose pliers to unclip the cable loom
Loosen the clip on the air intake hose and wriggle the hose off the air cleaner end. Undo the single (captive) bolt that secures the air cleaner assembly
Prise the hose off the input side and lift out the air cleaner assembly by pulling on the two grommet and pin mounts. In this picture the top has been removed from the air cleaner and filter removed. This gives a little more room to work, but isn’t actually necessary. You now have easy access to the filler plug. Note the rag stuffed in the end of the intake hose –I didn’t want any tools or screws ending up in there
With your container underneath, remove the drain and fill level plugs.
If you’re lucky enough to be using a vehicle lift or have a pit the chances are your car is level. Mine was on stands at the front only, so it needed lowering before refilling (and the ensure as much old oil as possible comes out). Bit of a faff this bit as the car will need lifting again to refit the under tray afterwards. I’m using an old washing up bowl to catch the oil, which is shallow enough to fit under the car when off the stands.
With the car level and the gearbox empty re-fit the drain plug with a new washer and tighten to 39Nm.
Remove the filler plug from the top of the gearbox and use your long spout funnel to pour in the first two litres of MTF3 as quick as you like. After two litres, add 50ml at a time slowly and keep a close eye on the fill level hole underneath. Once oil runs out you’re full.
Refit the level plug (with new washer) and tighten to 12Nm. Refit the fill plug (with new washer) and tighten to 44Nm.
Refit the air cleaner assembly not forgetting to reconnect the MAF sensor.
Refit the under tray and you’re done.
Whilst colour isn’t necessarily a good guide to remaining service life, I can’t help but think clean oil is better oil.
All that remains is to dispose of your old oil responsibly and put the kettle on.