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Home >> Mercedes Benz >> 2008 >> S550 Base >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Rear Axle -- S-Class (221) >> Testing & Repair >> Check rear axle differential oil level, correct if necessary - AR35.31-P-0520-03SX

Check rear axle differential oil level, correct if necessary - AR35.31-P-0520-03SX

DIFFERENTIAL HOUSING

Number Designation Model 216 Model 221
BA35.31-P-1002-02G Oil filler screw, differential Nm 50 50
DIFFERENTIAL

Number Designation Model 216 Model 221
BF35.31-P-1001-01S Filling capacity Rear axle differential 200FE, 200 mm dia. Liters 1.1 1.1
Specifications for service products Sheet BB00.40-P-0235-07A BB00.40-P-0235-07A
Rear axle differential 215FE, 215 mm dia. Liters 1.2 1.2
Specifications for service products Sheet BB00.40-P-0235-07A BB00.40-P-0235-07A
Rear axle differential 240FE, 240 mm dia. Liters 1.6 1.6
Specifications for service products Sheet BB00.40-P-0235-07A BB00.40-P-0235-07A
Rear axle differential 240V, 240 mm dia. Liters - 1.9
Specifications for service products Sheet - BB00.40-P-0235-07A
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1061-01A Sealant, Omnifit 100H (50 g) A 002 989 23 71
BR00.45-Z-1046-04A Loctite 7063 cleaning spray (150 ml) A 001 986 71 71 10

IMPORTANT Only carry out the oil level check at interior temperature and not on a rear axle center assembly which is at operating temperature. Otherwise, when the rear axle differential is at operating temperature, required oil could escape.

  1. Clean area around oil filler screw (50 g).
  2. Remove oil filler screw (50 g)

    IMPORTANT Replace oil filler screw (50g).

  3. If necessary, collect any oil which runs out and allow to run out until the oil still only drips out of threaded hole.
  4. Check oil level.

    IMPORTANT With the correct oil level the oil reaches up to the bottom edge of the threaded hole.

    Fig 1: Identifying Oil Filler & Drain Screws
    G07590585Courtesy of MERCEDES-BENZ USA
  5. Clean new oil filler screw and threaded hole in rear axle differential using cleaning spray and a suitable rag.

    IMPORTANT The oil filler screw and threaded hole must be free from oil and grease.

  6. Coat roughly one droplet of sealant on the second or third lower thread of the new oil filler screw.
  7. Screw oil filler screw into rear axle center assembly immediately and tighten to specified tightening torque.
    Fig 2: Coating Sealant On Thread Of Oil Filler Screw
    G07590586Courtesy of MERCEDES-BENZ USA