Motor electronics (ME-SFI) fuel injection and ignition system purge line version - GF07.61-P-0001-05A

Model 210.072 E 50 AMG 

The purge line (arrow, black line) from the intake manifold to the purge valve runs across the front of the left cylinder head.

Fig 1: Locating Purge Line

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.