So check your MID config, press and hold both the S and R buttons on wiper stalk for 3 secs....

You will get a display like:
047       03
      29885

The '047' is the config code (Code Index), the '03' is the software version (Code Version), and the 29885 is the pulses/km (has to vary with wheel circumference.

Pre 1998 (pre minifacelift) - be aware, 1994/1995 MIDs may have different codes...
Radio display line above the computer display lines

Engine	Manual	Auto	Code Index
X20SE	X		011
		X	012
X20SEV	X		013
		X	014
X25DT	X		015
		X	016
X25XE	X		017
		X	018
X30XE	X		019
		X	020
X20XEV*	X		021
		X	022

^* SIMTEC 56.5 only

Codes sometimes found on 1994/1995 cars if never has MID software updated.

Engine	Manual	Auto	Code Index
X20SE	X		001
		X	002
X20SEV	X		003
		X	004
X25DT	X		005
		X	006
X25XE	X		007
		X	008
X30XE	X		009
		X	010