Not necessary for some applications but on some you will find the clip is "stuck on" and will need some tool to pry it out. This is our creation to solve the problem.
We designed this tool to be able to easily pry off the C-clip holding the fluid tank onto the power steering pump on M112 and M113 engines.
M112 V6 M113 V8 Power Steering Reservoir Tank Clip Removal Tool
$9.75
SKU:
TUL-PSTANKCLIPTOOL 
Product Details
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$56.25
1998 to 2006 M112 V6 M113 V8 Power Steering Fluid 40K STANDARD Service Kit
This is an easy D.Y.I. procedure that you can do in your garage. Fluid available and our add-on magnetic inline filter can be purchased separately below. Full instructions including bleeding air out of system are included FREE.
For 2000 to 2006 chassis only mentioned in the title. Power steering reservoir is NOT for
$7.20
M112 V6 M113 V8 Power Steering Reservoir Tank to Pump Security Clip
Easy to lose and absolutely required. Will fit all V6 and V8 engines from 1998 to 2006 if you have the space (except M119 engine)
This clip is unique to these engines. The picture below will show you where it is attached to the fluid outlet tube on the tank. This is a genuine Mercedes part.