Mercedes-Benz 603 Service Manual page 26

Model 201
4 Connect contact handle of compression
pressure recorder 001 589
plug connector (X27) on left side of firewall and
connect connection line (04) of contact handle to
plug (Kl50) with adapter line 124 589 36 63 00.
5 Connect second connection line from
contact handle to positive pole (K130) on battery
(arrow).
6 Crank engine a number of times with starter
with transmission in neutral and shutoff lever on
injection pump (arrow) pressed to " stop" to
remove combustion residues in the
precombustion chamber of the cylinder.
Note
Always hold shutoff lever on injection pump
depressed when cranking engine. This prevents
fuel from being pumped and therefore running
out of the disconnected injection lines.
01.10 - 01014
78 21 00;
disconnect
EXIT