Mercedes-Benz 190 SL, W121-190SL (EU)

Power steering fluid capacity & service interval

Mercedes-Benz 190 SL, W121-190SL (EU) requires power steering fluid with a capacity of 0,3 liter. Service intervals occur every 18000 km. The data covers 1 configuration.

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

TypeSpecifications
190 SL, R121 (1955-1963)
  • Use: Normal
  • Capacity 0,3 liter
  • Check 18000 km

Additional Notes

  • The Mercedes-Benz 190 SL, R121 carries a power steering fluid capacity of 0.3 liter, which is a notably small volume consistent with a steering box design rather than a rack-and-pinion or hydraulic pump reservoir system.
  • A steering box configuration, as noted in the specifications for the 1955-1963 R121, typically holds fluid within the box housing itself, which accounts for the low 0.3-liter figure recorded here.
  • The service interval for the R121 steering box is set at 18,000 km under normal use conditions, meaning the fluid check interval applies to standard driving rather than demanding or high-stress operating environments.

Other Systems