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Home >> Mercedes Benz >> 2021 >> E450 Base, 2D Convertible >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 238 Chassis (3 Of 6) >> Testing & Repair >> Disconnect/Connect Battery Ground Line >> Disconnect/Connect Battery Ground Line - AR54.10-P-0003LWO

Disconnect/Connect Battery Ground Line - AR54.10-P-0003LWO

Model 238 

Shown On Model 238.### 1# Except Code B01 (48V technology) (On-board electrical system battery (G1) in engine compartment) 

G15378214Courtesy of MERCEDES-BENZ USA
WARNING Risk of injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities. No parts of the body or limbs should be within the operating area of mechanical components when moving components. AS00.00-Z-0009-01A
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 >= 30V AC and U >= 60V 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  General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system   AH00.00-Z-0300-01A
Topical note  Notes on battery   AH54.10-P-0001-01A
  Notes on HANDS-FREE ACCESS   AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Switch off ignition and store transmitter key outside of transmission range (min. 2 m). NOTES
All electrical consumers must be switched off. Otherwise, they may be damaged when the ground line (1) is disconnected/connected.
 
2.1 Remove dust filter with air duct segment. Model 238 except code B01 (48V technology)  
REFER TO MAINTENANCE     AP83.00-P-8381C
2.2 Remove trunk floor and luggage compartment well cover. Model 238 with code B01 (48V technology) AR68.30-P-4600LWO
3 Disconnect charger of on-board electrical system battery (G1). When an external charger is connected. AR54.10-P-1130LW 
4 Disconnect diagnostic unit. If a diagnostic device is connected.  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06LWO
5 Unfasten nut (2) and remove ground line (1) from negative pole of on-board electrical system battery (G1). IMPORTANT Model 238 with code B01 (48V technology)
The 48V on-board electrical system switches off 12V on-board electrical system support 10s after disconnection of the ground line (3).
TORQUE SPECIFICATION Nut, electrical line to negative terminal/positive terminal of on-board electrical system battery
*BA54.10-P-1004-01A 
6 Connect in the reverse order    
INSPECT Check     
7 Check time display. If the time is not correct.

Set time.
 
BATTERY

Number Designation Model 238
BA54.10-P-1004-01A Nut, electrical line to negative terminal/positive terminal of on-board electrical system battery Nm 6