Mercedes Benz S 550 4MATIC Technical Problem #LI01-30_P-048997 Date: 100303 Engine - Oil Leaks At Back Of Engine Camshaft caps leaking: Oil loss at rear of engine

Mercedes Benz S 550 4MATIC  Technical Problem #LI01-30_P-048997 Date: 100303
Engine - Oil Leaks At Back Of Engine
Camshaft caps leaking: Oil loss at rear of engine
Topic number LI01.30-P-048997
Version 4
Design group 01.30 Cylinder head
Date 03-03-2010
Validity All models with engine 272
All models with engine 273
Cleanpoint engine for cap A000 998 5690:
Engine 273: 2739xx30268766
Engine 272: 2729xx31006851
Cleanpoint engine for cap A000 998 5590:
Engine 273: 2739xx30264566
Engine 272: 2729xx30992044
Reason for change Supersedes DTB S-B-01.30/23b
Reason for block
Complaint:
Oil loss at rear of engine.
Note:
In isolated cases oil loss can occur at the rear caps (cover plugs) of the camshafts.
Cause:
Cap sealing ring leaking.
(In the event of borderline tolerances and under unfavorable climatic conditions the sealing ring can lose the preload necessary to seal off the oil
gallery)
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 291
Remedy:
Replace cap.
Note:
Replace all 3 or both (on engines with mechanical vacuum pump) caps.
Part number:
A000 998 55 90 (cap, small)
A000 998 56 90 (cap, large)
Symptoms
Parts
Work units
2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968)    Page 292
Validity