Fit For MAN TGA TGX TGS 6Pin 8Speed+R Truck Electric Gear Shift Knob 81326200091

How do I know if my vehicle needs a gear shift knob replacement?
Replacement is recommended if you experience any of the following symptoms:

• Shift buttons are stuck, unresponsive, or have no reaction when pressed
• Transmission warning light appears on the dashboard
• Gear position display is inaccurate or flickering
• Shift lever feels loose with excessive play