it has to be removed to gain access to the fixing bolts and it makes manovering the gearbox much simpler , first depressurise hydraulic system,then remove spring clip that holds the centre in, no need to remove any pipes off it, and pull centre out of reservoir [ its a bit tight but will come out] a tip is to cut the neck off a large plastic drinks bottle and place the centre inside, this stops L H M dripping everywhere then unbolt the reservoir and lift out if you intend reusing the L H M fluid simply leave in reservoir, if not pour into a container [L H M fluid should be changed every 2 years and the filters cleaned ] i'm pretty sure the 1.8 and the 2.0 use the same gearbox with the 1.6 having it's own and the diesels having there own to hope this helps
bob k, January 2010