Drop-glass Adjustment

The top adjustment of the rear channel, which only controls how deeply the glass engages with the channel:

The lower adjustment - the 'external' screw controls the depth of engagement of the glass with the channel, the 'inner' screw controls how closely the glass engages with the door seal towards the upper rear part of the opening:

Make sure there is a gap between the rear edge of the glass and the B-post trim channel. This glass could do with being a bit higher, but the upper stop peg is at the top of its slot, and it doesn't leak: