Audi A8 & S8 MMI Control Panel Guide (2011-2018): Sticky Buttons, No Response, and Replacement

Symptoms of a Failing Control Console Switch Panel

Failure of the MMI control panel in the Audi A8 and S8 can manifest in several ways, ranging from a minor annoyance to a complete loss of infotainment control.

1. Sticky or Slow-to-Return Buttons

This is the most common symptom. Due to the panel's location next to the cupholders, spilled drinks like soda or coffee are a frequent problem. The sugar and residue cause the buttons to become sticky, hard to press, or slow to pop back up. In some cases, a button may get stuck in the down position, causing the MMI system to behave erratically or become unresponsive.

2. Unresponsive Buttons or Touchpad

Buttons may intermittently or completely stop working. You might press a button like 'NAV' or 'RADIO' and get no response from the MMI system. This can be caused by dried liquid residue on the internal circuit board or a complete electronic failure of the switch itself. A severe liquid spill can short out the circuit board, leading to a total loss of function.

3. Erratic MMI System Behavior

If a button is stuck or the internal electronics are shorting, the MMI system can act unpredictably. This might include the screen cycling on and off, menus changing on their own, or the system freezing entirely. However, it's important to note that a black screen or a system that is completely dead might also be caused by a failure in another part of the MMI's fiber optic loop, such as the main head unit in the dash or the amplifier in the trunk.

Troubleshooting and Diagnosis

Before replacing the panel, try these simple steps which may resolve the issue.

• MMI System Reset: For software glitches or a frozen system, a reset can often help. Press and hold the following three buttons simultaneously until the MMI screen goes dark and reboots: the main control knob, the upper-right function button, and the 'TONE' button.
🎬 Watch: How to force reboot your MMI system
• Fuse Check: Some owners have reported fixing a completely dead MMI system by locating the MMI-related fuses in the trunk, pulling them out, inspecting them, and re-inserting them.
• Cleaning Sticky Buttons: For stickiness caused by spills, you can try cleaning the unit. A quick method is to spray electronics contact cleaner into the gaps around the affected buttons while pressing them repeatedly to work the cleaner in. For a more thorough job, the panel must be removed from the vehicle and disassembled for detailed cleaning of the button mechanisms and the circuit board with isopropyl alcohol.
🎬 See this guide on fixing sticky MMI buttons

Component Protection and Programming Requirements

This is the most critical factor to consider when replacing the MMI control panel.

Audi vehicles use a security system called Component Protection (CP) to link electronic modules to the vehicle's VIN. If you install a new or used control panel, it is highly likely that it will trigger Component Protection. When CP is active, the part may seem to work, but certain functions will be disabled. For the MMI system, this often results in a complete loss of audio.

Removing Component Protection is not a DIY job. It requires a special online connection to Audi's factory servers using a tool called ODIS. This means a trip to an Audi dealer or a qualified independent shop that subscribes to this service is necessary after installation. Standard diagnostic tools like VCDS cannot remove Component Protection.

Buying a Used Control Console Switch Panel

A used OEM panel is a cost-effective alternative to a brand-new unit, but careful selection is key.

• Part Number Compatibility: The part numbers for this panel have been updated over the years. The latest part number is 4H1919600M. This part number replaces, and is interchangeable with, older versions like 4H1919600C, 4H1919600D, 4H1919600F, and 4H1919600H. When buying used, look for any of these part numbers, but prefer the newest revision (later letter in the alphabet) if possible.
• Physical Inspection: When you receive the part, inspect it closely for any signs of liquid damage. Look for sticky residue on the buttons or any corrosion on the electrical connector pins.
• Verify Vehicle Options: The initial data for this part specifies it is for vehicles with the North American market Radio/Navigation system (Audi option code 8DY). Ensure the part you are buying comes from a vehicle with a matching configuration.

Replacement Procedure Overview

Replacing the MMI control panel is a feasible DIY project for those comfortable with interior trim removal. The difficulty is moderate.

1. Put the vehicle's ignition on (engine off) and place the gear selector into Neutral to provide clearance.
2. Using plastic trim removal tools, carefully pry up the trim surrounding the gear selector and MMI panel.
3. Remove the Torx screws holding the panel assembly in place.
4. Lift the assembly and carefully disconnect the various electrical connectors on the underside. Pay attention to the different clip styles on each connector.
5. Once the entire console trim piece is out, the MMI control panel can be unbolted from it.
6. Installation is the reverse of removal. Remember to have the Component Protection addressed by a professional afterward.

Cost Comparison

Frequently Asked Questions (FAQ)