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Home >> Mercedes Benz >> 2002 >> SLK230 Automatic >> Repair and Diagnosis >> Body & Frame >> Sun Roof/T-Top/Convertible Top >> Sliding Roof, Soft Top -- 170 Chassis >> Self-Diagnostic System >> Vario roof (VR), checking hydraulic system - AD77.50-P-7000A >> Hydraulic unit, checking hydraulic system, vario roof (VR) - AD77.50-P-7000-01A

Hydraulic unit, checking hydraulic system, vario roof (VR) - AD77.50-P-7000-01A

HAND-HELD TESTER Scope of test Measuring instrument/ test connection Operation/requirement Specified value
  • Possible cause/remedy
1.0  Checking hydraulic unit &.3.1.( AD77.50-P-2000-11A )   Support vario roof between catch and mounting with stopper 170 589 00 61 00  
  • Check emergency operation valve (item N)
      AD77.50-P-2000-18A    Tightening torque approx. 3 Nm
      Starting position: Vario roof resting on front catches, trunk lid pivoted to rear   
  • < 180 bar  ↓

Replace hydraulic unit
Specified value OK  ↓
AD77.50-P-7000-02A 
      Ignition: on 
Actuate roof switch for 5 s  (close)
Read off test pressure while switch actuated 
   
        180-200 bar