A professional Audi 90 roof-glass replacement is finished only when verification confirms sealing, alignment, and operation. We start with fit and finish: the glass should sit flush to the roofline with even gaps, consistent seal compression, and clean alignment to surrounding trim and moldings. Brackets, locating tabs, and fasteners are confirmed so the panel is not twisted, sitting high or low, or placing uneven stress on the frame and seals. We then perform functional testing. The sunroof and sunshade are cycled through vent, open, close, and any express functions to confirm smooth travel and correct stopping points. Many modern roof systems require a post-service initialization or teach-in so the motor learns limits and anti-pinch behavior; completing it helps prevent false reversals, hesitation, or incomplete closing. We also listen for abnormal noises that can signal misalignment or seal interference. Next we validate water management and wind-noise risk. Sunroofs route incidental water into a tray and out through drain tubes, so we run a controlled water test to confirm proper routing and drainage rather than pooling. When conditions allow, we add a short road-speed check for wind whistle. Finally, we provide documentation, aftercare guidance including cure time, and warranty details. Bang AutoGlass backs the work with a lifetime workmanship warranty.