Gearbox filler/drain plug sizes

[Dave Richardson]

Could someone tell what size hexagonal keys I need to change the gearbox oil on my W203 coupe please ?

Dave

 

[zenman63]

Not sure on your size but when I did the diff oil in the vito I think 20mm.
You need hex sockets anyway not just keys, there not big enough as there Very tight.

I when to Halfords and got a set cheap enough, 1/2" drive.