Head-up Display (HUD) Visual Improvement. After programming with ISTA/P 2.56.1 or a more recent version you will observe a change in the HUD. CAUSE A visual improvement to the Head-up display was introduced with ISTA/P V2.56.1 INFORMATION Vehicles programmed to F020-15-07-500 or higher received a modification of the HUD display which includes: More colors displayed Modified navigation display Improved HUD visibility for the driver.
