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Remove/install piston rings - AR03.10-P-7311FH

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ENGINE 276 in MODEL 172, 204, 207, 212, 218 

Fig 1: Piston Rings Remove/Install Components
G09974073Courtesy of MERCEDES-BENZ USA
REMOVING Remove     
1 Remove piston (5)   AR03.10-P-7021FH 
2 Take off plain compression ring (6c) with piston ring pliers SPECIAL TOOL Pliers Figure
3 Take off taper-faced hook scraper ring (6b) with piston ring pliers SPECIAL TOOL Pliers Figure
4 Remove oil scraper ring (6) by hand    
INSTALLING Install     
5 Mount oil scraper ring (6a) by hand    
6 Install taper-faced hook scraper ring (6b) with piston ring pliers IMPORTANT Note installation position of taper-faced hook scraper ring (6b). The "Top" marking or manufacturer's designation must face towards the piston crown (5a).  
SPECIAL TOOL Pliers Figure
7 Install plain compression ring (6c) with piston ring pliers IMPORTANT Note installation position of plain compression ring (6c). The "Top" marking or manufacturer's designation must face towards the piston crown (5a).  
SPECIAL TOOL Pliers Figure
8 Offset piston ring end gaps for piston ring (6a, 6b, 6c) by 120 0 degrees respectively on the circumference of the piston (5)    
9 Install piston (5)   AR03.10-P-7021FH 
Fig 2: Identifying Pliers (000 589 51 37 00)
G09974074Courtesy of MERCEDES-BENZ USA