Mercedes-Benz SLK-Class, R172 (USA / CAN)

Automatic transmission fluid capacity & service interval

Mercedes-Benz SLK-Class, R172 (USA / CAN) requires automatic transmission fluid with a capacity of 9 liters. The service interval is 77500 miles or 60 months. The data covers 3 configurations.

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

TypeSpecifications
SLK 55 AMG, 172.475 (2012-2015)
  • Use: Normal
  • Capacity 9 liter (Dry fill)
  • Change 77500 miles/ 60 months
  • Code: 722.9xx 7/1
SLK 250, 172.447 (2011-2015)
  • Use: Normal
  • Capacity 9 liter (Dry fill)
  • Change 77500 miles/ 60 months
  • Code: 722.9xx 7/1
SLK 350, 172.457 (2011-2015)
  • Use: Normal
  • Capacity 9 liter (Dry fill)
  • Change 77500 miles/ 60 months
  • Code: 722.9xx 7/1

Additional Notes

  • All three variants in the Mercedes-Benz SLK-Class R172 lineup share an identical automatic transmission dry fill capacity of 9 liters, meaning the figure represents a full overhaul fill with an empty, disassembled unit rather than a routine service top-up.
  • A dry fill value is relevant when a transmission has been completely drained, such as during a rebuild or full unit replacement, and the 9-liter figure applies uniformly across the SLK 250, SLK 350, and SLK 55 AMG configurations.
  • The SLK 250 (172.447) and SLK 350 (172.457) share the same 2011-2015 model year span, while the SLK 55 AMG (172.475) carries a narrower 2012-2015 range within the same generation.
  • Under normal use conditions, the automatic transmission fluid change interval for the SLK 250 and SLK 350 is set at 77,500 miles or 60 months, whichever comes first.
  • The SLK 55 AMG follows the same 77,500-mile and 60-month change interval under normal use conditions as the lower-displacement variants, despite housing a larger AMG V8 engine that places different mechanical demands on the drivetrain.
  • A 60-month interval translates to a five-year time-based limit, meaning a low-mileage vehicle would still reach a fluid change threshold on calendar time alone before accumulating 77,500 miles.

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