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Home >> Mercedes Benz >> 2021 >> CLS450 4Matic >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 257 Chassis 3 Of 8 >> Testing & Repair >> Remove/Install On-Board Electrical System Battery >> Remove/Install On-Board Electrical System Battery - AR54.10-P-0009FRX

Remove/Install On-Board Electrical System Battery - AR54.10-P-0009FRX

Model 257, 290 

with code U98 (LITHIUM-ION STARTER BATTERY (LISB)) 

Shown on model 257 

G14549063Courtesy of MERCEDES-BENZ USA
DANGER Risk of fire  /risk of explosion due to short circuit and escaping oxyhydrogen gas. Risk of (burn) injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte/mist, short circuit and arcing. Risk of poisoning  caused by swallowing battery electrolyte or absorption of lead through the skin or body orifices. Risk of death  due to voltage U >= 30 V AC and U >= 60 V DC. No fires, sparks, open flames, or smoking.
Wear acid-resistant gloves, clothing, and glasses. Pour battery acid only into suitable and appropriately marked containers.
AS54.10-Z-0001-01A 
Topical note Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Topical note General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment   AH00.00-Z-0300-01A
Topical note Notes on battery   AH54.10-P-0001-01A
  Notes on safety-relevant components   AH00.00-Z-0019-01A
REMOVINGINSTALLING Remove/install     
  Print out checklist for transport safety of on-board electrical system battery (G1). When replacing the on-board electrical system battery (G1).  
REFER TO FORMS Transport safety checklist for starter battery, form   OF54.10-P-3000-13A
2 Answer the questions on the installed on-board electrical system battery (G1) based on the transport safety checklist. When replacing the on-board electrical system battery (G1).  
3 Disconnect ground line (2) from on-board electrical system battery (G1).   AR54.10-P-0003FR 
4 Unscrew screw (3) of mounting rail (4) until on board electrical system battery (G1) can be removed. TORQUE SPECIFICATION Screw/bolt, battery mounting rail to battery frame *BA54.10-P-1001-01A 
5 Disconnect electrical connector (5) from on-board electrical system battery (G1).    
6 Remove cover (6).    
7 Disconnect positive line (7) from on-board electrical system battery (G1). TORQUE SPECIFICATION Nut, electrical line to negative terminal/positive terminal of on-board electrical system battery *BA54.10-P-1004-01A 
8 Remove on-board electrical system battery (G1).    
9 Install in the reverse order.    
10 Answer the questions on the removed on-board electrical system battery (G1) based on the transport safety checklist. When replacing the on-board electrical system battery (G1).  
BATTERY

Number Designation Model 257 Model 290
BA54.10-P-1001-01A Screw/bolt, battery mounting rail to battery frame Nm 23 23
BATTERY

Number Designation Model 257 Model 290
BA54.10-P-1004-01A Nut, electrical line to negative terminal/positive terminal of on-board electrical system battery Nm 6 6