VW Golf 3

MFA = MultiFunktions Anzeige = Wyswietlacz wielofunkcyjny

http://vagdrivers.net/forums/index.php?showtopic=21631

Put your key in (no turn yet). Press and hold the MFA button.
Turn key to acc. position. Turn key all the way back.
Turn key again to acc. position (no, it's no joke… ). Release the MFA button.

You are now in the 'secret' MFA operation mode.
Below you see a overview of what the codes and numbers mean.
Nice gadget: the digital rev counter

MFA switch on position 1:
1. Engine code
2. Land code
3. Speedometer
4. Upper rev limitter
5. Lower rev limitter
6. Decelaration fuel pressure
7. Display test

MFA switch on position 2:
1. Test programm of programmed bytes
2. G60 pressure meter
3. Digital rev counter
4. Fuel usage (like normal)
5. Signal from speedo sensor
6. Oil temperature (like default)
7. Ambient temperature (like default)

http://www.golfgtiforum.co.uk/index.php?topic=131243.msg1181500#msg1181500

IN00 means you don't need a service
OEL = oil service
IN01 = inspection service
IN02 = major service

Switch ignition on
Press and hold left hand button on speedo display
Switch ign off
Release button
The letters “OEL” will appear on the speedo display
Press clock minute button (lower one) until “—–” is shown
Switch ign on and “IN00” should show

Ignition on
Press and hold left hand button on speedo display
Switch ignition off
Release button
Press and release button
IN01 will show in the display
Press clock minute button (lower one) until “—–” is shown
Press left hand button to show “OEL”
Press right hand button to show “—–“
Switch ignition on and “IN00” should show

Ignition on
Press and hold left hand button on dash
Switch ignition off
Release button
Press and release button
IN02 will show in the display
Press clock minute button (lower one) until ”—–” is shown
Press left hand button to show “IN01”
Press right hand button to show “—–“
Repeat to reset “OEL”
Switch ignition on and “IN00” should show

http://www.golfgtiforum.co.uk/index.php?topic=131243.msg1181500#msg1181500

It is possible to program the current settings you want for the counters.
This used if the speedo display is replaced or if you want to set your intervals to a shorter value than the factory. For example, you can set the computer to display OEL after only 3000 miles.

1. Turn on the ignition
   
2. Depress the trip-reset button on the speedo display
   
   • Also depress the button to set the MINUTES of the digital clock (lower one).
     
3. The LCD display should read “OEL 1,S”, where the S indicates SET.
   
4. Using the trip-reset button, you can call up the following counter banks for the service intervals in sequence:
   
   • OEL 1,S - distance counter for oil change (ie 7500 miles normally)
     
   • OEL 2,S - time counter for oil change (ie 12 months)
     
   • IN 01,S - time counter for yearly service interval (ie 12 months)
     
   • IN 02,S - distance counter for special service (ie 15,000 miles )
     
5. Using the button for setting the MINUTES on the digital clock (lower one), you can display the value of the counter. Repeated pressing of the button will select a subsequent lower value of the counter and at the lowest level, it will reset to the highest level and begin to decrease again. The step sizes are blocks of miles (500 miles, I think) and months (the time setting for the yearly service is a bit strange as I think it can be set to 1,2,3,4,5 or 6(Maybe it counts in 2 month blocks? Does anyone know?).
   
6. Once you have set each counter to the value you want, turn off the ignition.
   
7. Work is done.