Preparation for Test

Note: Test only if rear axle vehicle level drops or does not raise. Test with vehicle weight on all 4 wheels. Test with vehicle at normal level. 1. Switch on level control lock-out switch (S77/1s1) (switch should illuminate). 2. Check oil level in oil reservoir (2), correct if necessary. 3. Disconnect overflow oil return line (LL/LR) for suspension strut (11) at connecter (arrow). 4. Connect coupling (038f) and bleeder screw (038n) to steel hydraulic line. 5. Disconnect return line (T) at oil reservoir (2), connect a suitable hose (061) and hold it in a measuring container.

		Test scope	Test connection	Test condition	Nominal value	Possible cause/Remedy
1.0		Internal leakage of leveling valve Overflow quantity of suspension strut.	Measuring container.	Overflow oil return hose (LL and LR ) in measuring container.	Total overflow oil quantity: 2 cc in 4 hrs.	Replace ADS strut.
		Leveling valve	Measuring container.	Oil return line in measuring container.	Oil return flow should stop after 5 min.	Replace leveling valve.