Mercedes-Benz 603 Service Manual page 118

Naturally aspirated engines:
2
Remove air intake hose (arrow) and air
cleaner cover together with filter cartridge, if not
already removed.
Turbo-engines:
3 Remove intake hose to exhaust gas
turbocharger.
4 Disconnect fuel lines (arrows) from fuel filter
and remove lines from fuel filter.
5 Unbolt hex. head bolts
and remove fuel filter from cylinder head.
01.10 - 415/7
(116)
from fuel filter
EXIT