The turbo actuators on these are vacuum operated and the diaphrams fail resulting in limp mode and fault P0229.

Replacement is pretty straightforward EXCEPT that the nut on the actuator rod is tucked behind the turbo and is inaccessible.

You might be able to get at it with a small 10mm half moon spanner but I think it would be a struggle even with that.

You need a "Sharper" angle than a normal half moon.

I took a 10mm combination spanner and using a oxy-torch, bent it at right angles about an inch back from the ring end. I then made a more gentle bend in the same direction at the other end.

(If that makes sense)

(I tried to create some ASCI-Art to illustrate but the message board will not accept multiple spaces?? )

With such a tool, job becomes much easier.

Hope this helps somebody