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Removing and installing GSM 1800 MHz network compensator - AR82.70-P-0010AE

MODEL 220 as of 1.7.00 with CODE (854) MB cellular telephone 

Fig 1: Identifying GSM 1800 MHz Network Compensator Remove/Install Components
G10128893Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Removal, installation     
1 Connect quiescent current retention unit   AR54.10-P-1030-07I
COMMERCIALLY AVAILABLE TOOLS *WH58.30-Z-1012-09A 
DANGER Risk of explosion  caused by escaping oxyhydrogen gas. Risk of injury  caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries  caused by short circuit. Risk of poisoning  caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices No fire, sparks, open flames or smoking. Wear acid-resistant gloves and clothing and safety glasses with side guards.
Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.
Only fill liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.
 
2 Disconnect ground cable of battery    
NOTES Notes on battery All models.  
3 Remove rear shelf    
4 Release connector on E-network compensator (A28/3) and disconnect    
5 Disconnect antenna connections    
6 Unscrew nut (3)    
7 Remove E-network compensator (A28/3)    
8 Install in the reverse order    
COMMERCIALLY AVAILABLE TOOLS

Number Designation
WH58.30-Z-1012-09A Quiescent current retention unit