150,000 miles on clock, full service history.
Intermittant problem with multitronic box. Start engine, P indicated. Change to reverse and PRND shown without any highlight. Car will not move. No change to display when Neutral or Drive selected. Display does not change to numbers if Tiptronic selected.
Try again without turning off and maybe gear selected okay (was able to drive onto breakdown truck!).
No strange noises, no fluid leaks, no warning lights.
Dealer quoted £1000 for new control box. £3500 for new gearbox and controller. Is a repair possible? Any other suggestions?
Is there an automatic transmission specialist company in Oxford area?

thanks

Dom