I just picked the cruise control out of a 1986 Jetta GL (Wolfsburg?) at the junkyard today ($40 for everything!). The donor car did not have the MFA. I will transplant the cruise control into a 1987 GTi with MFA. The speed sensor on the Jetta was integrated into the mileage counter box (the one that is mounted in-line with the speedometer cable and turns on the OX light every 30 k miles) above the brake master cylinder.
My question is: On A2 cars with MFA and cruise, does the cruise control get its signal from the speed sensor mounted at the back of the instrument cluster (the same one used by the MFA) or does it still use a speed sensor integrated into the OX light mileage counter box?
TIA