Hi all.

My speedo stopped working yesterday - because of my fault.

I tried to reset the trip counter after filling up, but hit the button to fast after firing up the engine. That accidentally started the re-calibration routine. To my knowledge I didn't alter any number of that 5- or 6-digit code that appeared on the display. If I did then unknowingly.
I also didn't set off and remained parked, engine running.

When I finally got off the petrol station, I realized my speedo entirely stopped working. I did almost 500km yesterday, however the trip master was only counting 12 kilometer.

I disconnected from power supply - no change.
How do I get the thing working again?
Can anyone provide me with the right data for my car and wheel dimension (195/60/15)?

Thanks in advance.