No, the broken lift angle causes severe drag. The closed position is set by microswitches in the motor assembly. Full open and full tilt are set by the slip clutch (that is, the motor will turn but the clutch will slip).

The broken lift angle will cause very hard operation, so the clutch slips. When selecting 'up', the motor will run as long as the switch is pushed, if pushed forward for 'closed', the bridge will move some and the motor will stop on the microswitch, but the pane will not be completely closed since it's only partly connected to the bridge.

Eventually the broken lift angle will cause the bridge to cock and jam, so don't use the sunroof until you can get it fixed properly!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!