CANchecked MFD28 Gen2 Vent Display for Audi A4/A5 B9 (F4)

The CANchecked MFD28 Gen2 replaces the factory air vent insert with a fully integrated data display for Audi A4/A5 B9 (F4). The vehicle-specific bezel keeps the vent functional, allowing airflow past the screen. Designed for straightforward installation, with illustrated instructions available for most displays.

Key features

• OEM-style integration: Vehicle-specific bezel with retained vent airflow
• CAN bus data: In-depth ECU data readout comparable to manufacturer diagnostic tools
• Gear display: Via CAN bus or calculated from speed and RPM
• Touchscreen operation: Page navigation with swipe gestures
• Custom pages: Create your own layouts, add images or a start animation
• Extra inputs: Up to 4 analog inputs plus a direct ethanol sensor input
• CAN switching: Use the display as a keypad and send custom CAN messages
• Configurable alarms: User-set thresholds with prominent warnings (e.g., EGT above 900°C)
• Logging: Record data to the internal SD card for later analysis
• Performance meter: 0–100, 100–200, and 0–200 time measurement without additional hardware
• DTC*: Read and clear faults from engine ECU, transmission, ABS, and all-wheel drive
• Dimming*: Auto-dims along with the instrument panel

Pages and layouts

• Delivered with predefined sample pages
• Up to 10 pages supported
• 20 widget types (e.g., sensor value, analogue pointer, YT diagram, speed bar, round display, vertical/horizontal bar)
• Drag-and-drop positioning and scalable widget sizing
• Fully adjustable widget colors
• Up to 64 widgets per page

Display Setup Software (DSS)

DSS is used to configure the display, manage layouts, and work with logs. It includes a log viewer, a CAN logger, and a TRI Editor for sensor setup (CAN bus and internal), including sensor naming and min/max warning thresholds.

Supported values (examples)

The display supports CAN bus data queries (UDS, TP2, manufacturer-specific protocols). It is supplied with predefined TRI/TRX files that define the sensors queried; available channels vary by engine, and missing values can be added later.

Temperatures

• Exhaust temperature, coolant temperature, oil temperature, intake temperature, outside temperature, gasoline temperature, DSG temperature

Pressures

• Boost pressure, ambient pressure, fuel pressure (pre-feed pump), rail pressure (actual/target)

Lambda/mixture

• Lambda value, injection time, short-term lambda adjustment, long-term lambda adjustment

Other

• RPM, air mass, vehicle speed, throttle angle, total ignition angle, ignition angle retraction per cylinder, N75 timing (%), terminal 30 voltage, torque, gear, diesel-specific values

Connections and expansion

Four analog inputs support linear 0–5V and NTC sensors. CANchecked in-house sensors are predefined in the TRI/TRX files and can be connected directly:

• AIN1: Temperature sensor (NTC01)
• AIN2: Type K exhaust gas temperature converter (TCC01)
• AIN3: Pressure sensor 0–10 bar (FLP01)
• AIN4: Boost pressure sensor 0–5.5 bar absolute (BST10)

A pre-assembled AIN wiring harness can be used for connection.

An external shift light with eight LEDs can be connected; flash colors and RPM limits are configured directly on the display.

An ethanol sensor connects directly to the display. A 10K pullup resistor between 5V and the signal is required to view and log ethanol content and temperature.

Advanced functions

Math-Channels allow calculated channels from existing sensors. The User-Table enables additional sensors using 2D or 3D maps.

What’s included

• MFD28 Gen2 data display integrated into the ventilation insert (LHD vehicles)
• Vehicle-specific connection cable
• Quickstart guide
• USB data cable
• SD card (pre-installed in the display)
• SD card adapter
• Display foil (anti-reflection)

Optional accessories

• CC24000 SLM08 - external switching lightning module
• CC22780 ANC04 - four-way AIN-harness
• CC22100 CBD08 - eight-way CAN Distribution Hub
• CC22902 NTC01 - temperature sensor for liquids 1/8 inch NPT
• CC22903 TCC01 - type K converter 0–1250°C
• CC22901 FLP01 - pressure sensor 0–10 bar (145 psi) M10x1
• CC22900 BST10 - pressure sensor 6.5 bar relativ (95 psi)

*Not available on all protocols.