Stilo Accumulator Replacement

Multiecuscan software and cable.
Narrow stubby open ended spanner or make the crows foot spanner as shown.
Important. Try spanner on new accumulator. If it is too wide it will foul the actuator body when trying to turn it.

Ok. This is optional but it makes removal much easier.

The instructions just say to remove accumulator but there is not much room for a spanner. So I bought a 27mm ring spanner. Bent the open end 90deg with a gas torch then ground a 3mm chamfer on the upper side of the jaws so it sat snug up against the accumulator and the jaws did not extend below the hex on the accumulator (a custom crows foot spanner)
Note chamfer on jaws.

The elearn instructions encourage excess dismantling at times and I ignored the one to remove engine ECU.

I found removing the air tube then unplugging pump made getting to plug much easier.
Unplug the pump.
De-pressurise using MES
You can check the pressure with MES too.
Unscrew the accumulator. Careful not to catch the spanner against anything, keeping it up against the bottom of the accumulator. There may be a little residual pressure so don't point the end of it toward you as you lift it out.
Screw new one one and give it a nip up. Small thread so not too much force.
Plug the pump in and test. I did not need to bleed but that can be done with MES.
Refit air tube.