I heard that the noise in the rear suspension of my 400E could be

1)
1243527765 Rear Differential Mount- Rubber/Metal Bushing at Rear Differential to Rear of Subframe (2x)
There seem to be 2 different sizes 29 and 38mm?
2)
2203520227; Rear Control Arm Bushing- Rear Outer at Rear Bearing Knuckle (2x)
Do I need the mounting kit?


If true - how complicated are these parts to change. What tools are required?
I have no lift and need to work on the drive way.

Best, Martin

Martin