Mercedes-Benz 603 Service Manual page 259

Valve stem seals with standardized exterior
dimensions are installed due to automatic
cylinder head assembly.
Production breakpoint: 1 l/85
not recorded
Inlet valve stem seals without gas lip have been
fitted since 09 89 and exh,aust valve stem seals
without gas lip since 04 90.
05 10 - 270 2
EXIT