iF YOU RUN A SEARCH HERE there is a guy who went into detail on replacement. I even had a post with picture showing the wrong sensor I bought the 1st time; they list two, one lines up wrong. I believe I wrote the part numbers in that post.
My only problem was I needed a thin deep star socket. The one I had was too thick. I found what I needed at NAPA.
It is very easy once you feel around and find it. Much easier that brake pad replacement. It is one electrical clip to take off the wire , then remove one hold down bolt.

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Steve Danville
what i did myself.
CPS
rear shocks
MAS x 3.
SparkPlugs (twice)
Fuel pump & Filter
Window switch
replaced both failed horns with Honda horns.
Cleaned ERG Tube
Oil changes
Oil consumption Fix
Brake Pads
A/C Recharge
Anti-Freeze change X 2.
Front Shocks. Monroe. $90
Mercedes Warrenty Work:
Harmonic balancer,power steering clamp. Cat converters.Drive Shaft Bearing.s
Replaced Outer Lower Tie Rods and front lower ball joints at 156,000 miles