This video shows how I replaced the front lower control arm of my GLC 250d X253 to fix squeaking noise. I believe the same process also works for W205 C class
Tools you need are:
1/2 inch impact driver and swivel attachment
1/2 inch torque wrench
12 point 24mm socket
12 point 24mm spanner
E18 and E20 socket or spanner
9mm spanner
19mm ratcheting spanner
21mm impact socket
8mm socket
T45 socket
pry bar