does anyone have or got access to the instrument cluster diagrams for an m535i.my cluster has 3/26 pin connectors(blue,yellow and white)i need to find out which pin does what.ive replaced the batteries and its helped a bit but now the temperature gauge on the computer goes down to -30c.plus the rev counter and economy bar are still playing up.if i can fix it,it may help you guys out too.my car is british and of 1986 vintage.any help would be great.thanks