If it's a W210 "CDI" with the 722.6 5 spd it is in the usual place at the rear of the engine compartment. Red lock pin on top; break off, push lock out bottom.

The tube is empty; dip stick is a "factory tool".

If there are no leaks it is prob fine.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)