Vario roof (VR), checking hydraulic system - AD77.50-P-7000A: Notes

MODEL 170 

	Risk of injury  caused by pinching or jamming  when working on loaded springs or spring bodies	Use only approved clamping devices; shield off hazard area if necessary. Inspect special tools for damage and proper operation (visual inspection). Wear protective gloves.	AS00.00-Z-0001-01A
	Risk of injury as a result of trapping or crushing when working on the partly open Vario roof (stop mode) or within its closing range as a result of the Vario roof suddenly collapsing	Secure the Vario roof with a suitable special tool.	AS77.50-Z-0001-01A
	Risk of injury. Moving parts can pinch, crush or  , in extreme cases even sever  extremities.	No parts of the body or limbs should be within the operating range of the mechanism when moving components.	AS00.00-Z-0009-01A
	Connecting and using test equipment		AD00.00-P-1000AZ
	Vario roof (VR) diagnosis, previous knowledge		AD77.50-P-2000A
	Vario roof (VR), location of hydraulic components		GF77.30-P-0001-02A
	Before starting the test, check the oil level in the hydraulic unit reservoir and correct if necessary (Maintenance Manual). Oil loss in supply reservoir
	To enable inspection work to be performed correctly in the event of loss of fluid from the hydraulic system, remove any trim elements which conceal the hydraulic components.
	The front catch can be locked or released with the emergency operation key (in toolkit) the catches in the trunk can be released via the pull cables (see operating instructions).
	The hydraulic circuits for the individual roof movements and their hydraulic components can be checked individually.
a	Connect up pressure gauge according to connection diagram		AD77.50-P-2000-06A
b	Check hydraulic unit and hydraulic cylinder for Vario roof		AR77.37-P-3502G