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Home >> Mercedes Benz >> 2007 >> S550 Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical -- Testing & Repair -- S-Class (221) >> Testing & Repair >> Disconnect/connect ground line from on-board electrical system with two batteries - AR54.10-P-0003-03SXS

Disconnect/connect ground line from on-board electrical system with two batteries - AR54.10-P-0003-03SXS

DANGER Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning and caustic burns  caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers. AS54.10-Z-0001-01A
NOTES Notes on battery AH54.10-P-0001-01A
BATTERY

Number Designation Model 221
BA54.10-P-1028-01C Bolt/nut, ground line of battery to body M8 Nm 16
  1. Loosen nut on ground line (2) and remove ground line (2) from negative terminal of on-board electrical system battery (G1).

    NOTESInstallation:  Pay attention to tight seating of ground line (2), otherwise damage to the negative terminal of the on-board electrical system battery (G1) and electrical system can occur.

    Fig 1: Identifying Ground Line And On-Board Electrical System Battery
    G07594032Courtesy of MERCEDES-BENZ USA
  1. 2.1 Lift up trim of cargo area floor, remove bolt (4) of ground line (3) of starter battery (G1/4) on longitudinal member and set aside ground line (3).

    IMPORTANT Not when removing the starter battery (G1/4).

    IMPORTANTInstallation:  Observe tightening torque.

  2. 2.2 Loosen nut on ground line (3) and remove ground line (3) from negative terminal of starter battery (G1/4).

    IMPORTANT When removing the starter battery (G1/4).

    NOTESInstallation:  Pay attention to tight seating of ground line (3), otherwise damage to the negative terminal of the starter battery (G1/4) and electrical system can occur.

  3. 3 Connect in reverse order.