The power steering fluid dipstick is part of the cap on the reservoir
View of the power steering and self leveling system hydraulic fluid reservoir
The fluid level should be between the minimum and maximum level marks
The power steering fluid reservoir is located on the left side of the engine toward the front. On E36 models, it may be necessary to remove the air filter housing to access the reservoir.
Stop the engine and remove the cap/dipstick from the power steering reservoir. The dipstick is part of the reservoir cap and is removed by turning the cap counterclockwise. Wipe the filler cap from debris before removing the cap, then remove and wipe the dipstick and replace in the reservoir. Remove the cap and check the level. Check that the level is between the marks on the dipstick and add fluid as necessary. Run the engine and recheck the fluid level. With the engine not running, the fluid level may rise above the marks on the dipstick, but this is normal.
The coolant expansion tank is translucent, which makes checking the fluid level easy The integral coolant expansion tank is also translucent for easy level checks The bleeder is located next to radiator cap. Check the radiator cap gaskets when removed
BMW vehicles are equipped with translucent coolant expansion tanks. There will be marks indicating "MAX" and/or "COLD" levels. There is no need to remove the fill cap from the expansion tank to check the fluid level. Do not remove the fill cap unless coolant needs to be added to the system.
Here is a diagram of the under hood, (m50) yours shoudl be similar to it.