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2020 -2010 Mercedes Benz Truck G 550 Technical Service Bulletin # S-01_30-28A Date: 100329

2020 -2010 Mercedes Benz Truck G 550 Technical Service Bulletin # S-01_30-28A Date: 100329



Engine - Misfire Or Oil Consumption Service Guidelines



Date: March 29, 2010



Order No.: S-B-01.30/28a



Supersedes: S-B-01.30/28 June 8, 2009



Group: 01



2010 Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963) 173



Revision History



Revision Date Purpose



a 3/29/10 Bulletin text modified



- 6/8/09 Initial issue



SUBJECT:



MY-All, All Models Equipped with M272 and M273 Engines



Cylinder Head-Related Complaint Guidelines



If you receive customer reports regarding vehicles equipped with Engine 272 or 273 related to a misfire or oil consumption, follow the guidelines



herein to determine further actions.



Perform checks and / or repairs according to published WIS (such as, AH01.00-P-0300-01VA), DTB (such as S-B-07.61/72a - misfire codes; DTBs



and LIs in group 18 or 01 related to oil consumption) and other official documents.



Note:



Do not replace cylinder heads based on suspicion alone and follow the guidelines to make a proper determination. Only the compression and leak



down test values taken from engines at operating temperature could be taken for consideration. Proper inspection of combustion chamber requires



MB Special Tools approved Borescope.



Note:



Use only approved methods to remove any carbon deposits when performing a repair. Mechanical carbon deposit cleaning (and use of any sand



paper, abrasive pads or disks or sanding tools) is not allowed under warranty and cylinder heads should not be removed to do that. Use only



approved fuel additives - Keropur part # A000 989 25 45 12. Dealers might be debited when performing unapproved or incorrect repairs as well as



when unnecessarily replacing parts.



Note:



If the guideline test steps are inconclusive, revert to the SDS guided test as indicated by the DTB S-B-07.61/72a and / or properly determine a root



cause of the complaint.



2010 Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963) 174



2010 Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963) 175



2010 Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963) 176



Complaint Process Guidelines (Pages 2-4) shown above.

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