Attention! If the vehicle is equipped with electronically controlled air suspension, turn off the suspension height control switch.
41. Using a suitable wrench, remove the plug from the rear differential (pic. 4.41).
Pic. 4.41. Location of the check/filler plug on the rear differential
42. With your little finger, get to the inside of the crankcase to feel the oil level by touch. The level should reach the bottom roll of the hole or be slightly lower. If it doesn't, use a syringe or squeeze bottle to add the recommended oil through the same hole.
43. Screw in the plug and tighten it securely. Drive a short distance (several kilometers), and then check for leaks.