Does anybody have any detailed information on topping up/changing the gear box oil on a M3W?
I did try searching the Forum but I'm new to this and couldn't find anything but I can't be the first to ask this!
Remove the boot liner.
Jack up the rear of the car and support.
Remove the drain plug in the rear face of the bevel box 24mm socket required with a short extension, if you have the NVH kit access is tight
Lower car and allow oil to drain not much comes out only about 300ml
Raise car again and refit drain plug undo filler, which is about 50mm directly above the drain plug on the rear face and requires an allen(hex) key to undo, 10mm if I remember.
Using a syringe and plastic tube fill the bevel box from above where you have removed the boot liner until oil comes out of the fill hole and refit fill plug.
Lower car
Refit boot liner
You will find threads on here recommending filling through the orange breather on the RH side of the bevel box, this is not recommended as it can lead to leaking seals.
There are lots of threads on the subject, try using google and something like "talk morgan bevel box oil change"
