Mercedes-Benz SL-Class, R129 (USA / CAN)

Differential fluid capacity & service interval

Mercedes-Benz SL-Class, R129 (USA / CAN) differential fluid capacity ranges from 1,1 to 1,6 liters. Service intervals require a check every 30000 km. The data covers 6 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • SL 320 (1993-1998)
  • Rear
  • Use: Normal
  • Capacity 1,2 liter
  • SL 320 (1993-1998)
  • Rear, limited slip
  • Use: Normal
  • Capacity 1,2 liter
  • SL 500 (1993-2001)
  • Rear
  • Use: Normal
  • Capacity 1,1-1,6 liter
  • SL 500 (1993-2001)
  • Rear, limited slip
  • Use: Normal
  • Capacity 1,1-1,6 liter
  • Check 30000 km
  • SL 600 (1993-2001)
  • Rear
  • Use: Normal
  • Capacity 1,1-1,6 liter
  • SL 600 (1993-2001)
  • Rear, limited slip
  • Use: Normal
  • Capacity 1,1-1,6 liter

Additional Notes

  • The Mercedes-Benz SL-Class R129 SL 320 rear differential holds a fixed 1.2 liters, whether equipped with a standard or limited-slip unit, indicating a consistent housing size across both differential variants on the inline-six platform.
  • The SL 500 and SL 600 rear differentials share a capacity range of 1.1 to 1.6 liters rather than a single fixed value, reflecting a variable fill specification that accounts for differences in how fluid settles or the exact fill point used during service.
  • The SL 320 differential capacity of 1.2 liters is notably lower than the 1.1-1.6 liter range seen on the V8 and V12 variants, which aligns with the generally smaller rear axle assemblies paired with six-cylinder engines compared to higher-displacement powertrains.
  • Among all six configurations listed, only the SL 500 limited-slip differential carries a service interval specification, with a fluid check interval of 30,000 km under normal use conditions.
  • The standard rear differential on the SL 500 (1993-2001) carries no check interval in the specifications, while the limited-slip version of the same model year range does, pointing to the additional maintenance attention that limited-slip clutch packs typically require.
  • The SL 600 limited-slip differential shares the same 1.1-1.6 liter capacity range as the SL 500 limited-slip unit, yet no check interval appears in the SL 600 limited-slip specification, unlike the SL 500 counterpart.

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