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

Automatic transmission fluid capacity & service interval

Mercedes-Benz SL-Class, R129 (USA / CAN) automatic transmission fluid capacity ranges from 7,7 to 8,7 liters. Service intervals occur at 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)
  • Use: Normal
  • Capacity 8 liter
  • Code: 722.6xx 5/1
SL 320 (1993-1998)
  • Use: Severe
  • Capacity 8 liter
  • Change 30000 km
  • Code: 722.6xx 5/1
SL 500 (1993-2001)
  • Use: Normal
  • Capacity 8,6 liter (Overhaul capacity)
  • Capacity 7,7 liter (Service fill)
  • Code: 722.3xx 4/1
SL 500 (1993-2001)
  • Use: Normal
  • Capacity 8,7 liter
  • Code: 722.6xx 5/1
SL 600 (1993-2001)
  • Use: Normal
  • Capacity 8,6 liter (Overhaul capacity)
  • Capacity 7,7 liter (Service fill)
  • Code: 722.3xx 4/1
SL 600 (1993-2001)
  • Use: Normal
  • Capacity 8,7 liter
  • Code: 722.6xx 5/1

Additional Notes

  • The Mercedes-Benz SL-Class R129 SL 320 lists a single automatic transmission fluid capacity of 8 liters, with no distinction between overhaul and service fill figures.
  • Under severe use conditions, the SL 320 (1993-1998) carries a fluid change interval of 30,000 km, which applies alongside the same 8-liter capacity specified for normal use.
  • The SL 500 (1993-2001) and SL 600 (1993-2001) both list two separate capacity values: 8.6 liters for overhaul and 7.7 liters for service fill. An overhaul capacity reflects the total system volume when the transmission is fully disassembled and refilled, while a service fill reflects the lesser volume replaced during a routine fluid change without a full teardown.
  • A second capacity entry of 8.7 liters appears for both the SL 500 and SL 600 under normal use, representing a figure distinct from the overhaul and service fill values listed in the paired rows for the same variants.
  • The SL 320 spans model years 1993-1998, while the SL 500 and SL 600 each span 1993-2001, meaning the V8 and V12 variants continued for three additional years beyond the inline-six.
  • No change interval is listed for the SL 500 or SL 600 under normal use conditions, whereas the SL 320 carries an explicit 30,000 km interval tied specifically to severe use.

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