Check oil level

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Hydraulic Fluid Level Marks

Courtesy of BMW OF NORTH AMERICA, INC.

Check fluid level with engine switched off at expansion tank of power steering/ride height control system. The oil temperature should be approx. 20 °C here.

Ensure that the cap is fully screwed in prior to the fill level check.

If necessary, add hydraulic fluid up to Max. marking (1).

IMPORTANT: If the oil level has dropped to the min. marking (2), you must inform the customer and check the power steering and ride height control for leaks and issue a separate invoice for this work.
It is not enough merely to top up the fluid.

NOTE: To avoid mix-ups when filling with hydraulic fluid, mark the fluid reservoirs or their caps with identification marks.

ATF Automatic transmission fluid

CHF Pentosin CHF11S

Fig 2: Identifying Fluid Reservoirs Caps With Identification Marks

Courtesy of BMW OF NORTH AMERICA, INC.