C5 petrol Mk II Rear Radius Arm replacement

[Larsen]

Hi

Need some advice here.

I'm getting these "klonk" sounds from the left back wheel, when dringing on a bumpy road.

I guess its the parts in the rear suspension arms, that are worn.

I found this: http://www.eurocarcare.net/bearings-bus ... r-kit.html

Questions:

1) is it the right part? I'm doing both sides .
2) Do some body have at detailed how-to, would highly apreciate it.
3) Which tools is requeried?

Thank you.

/lars