I am stuck in removing a sliding window panel on which the glass broke) - its a single pane type aluminum one and the home was built in 1999. On all such panels Ive come across - sliding to a "free" position or removing a blocking piece was required and you just lift the window up and it tilts out.

In this one - I cannot for the life of me get it to lift enough to free the lower track, there are no blocking pieces either - the only small blocking piece I found was a tiny plastic one that was on the window handle, it removes to expose a clearance point.

But I cannot lift it enough to clear the lower track, its 1/4 inch short of clearing it.

Do I have to get a special tool or is there some spring on the top rollers?

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)