If you want IP information have a look in the W123 non turbo part of the FSM

Chap 07-001 states

PES 4 M 55 C 320 RS 47 (M) was used in the OM615.912

PES 4 M 50 C 320 RS 14 (M) was used in the OM615.913

You should be able to find the these numbers on the pump - this is the front part of the "IP" - the back part which is a bit bulkier is the governor and that has a different number...

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!