I used this one time and it worked great. This is the kit by Mercedes Source, comes with the pressure tester, shims, and instruction manual along with 5 used injectors that tested good from my 84' 300d.

Works for all OM 617 engines

$175+ shipping

Located in Clinton, CT

Tester alone retails for $190 on Mercedes Source

Email: dhmike661@hotmail.com for photos.