Matrix Gear Shift Indicator Problem

Hey there! That sounds like a real headache. I had a somewhat similar problem with my old Opel Astra. The symptoms weren't exactly the same, but the gear indicator was acting up, and the transmission was behaving erratically. Did you check the transmission fluid level and condition? Also, have you tried scanning the car for specific error codes? That might give you a better idea of which sensor or component is failing.

Thanks for the quick reply! I appreciate the advice. I did check the transmission fluid level, and it seemed to be within the normal range, but I'm not entirely sure about the condition. Yes, there were errors stored, but they were rather generic and didn't pinpoint a specific sensor. They pointed to a general transmission malfunction. Could you elaborate on how you narrowed down the issue on your Opel Astra?

Okay, generic codes are the worst! On my Astra, after a lot of digging and checking the wiring, it turned out to be a faulty sensor on the transmission itself. But honestly, given the range of problems you're seeing – no display, shifting issues, noises – it really does sound like the control unit could be the culprit. At this point, I'd strongly recommend taking it to a trusted workshop that specializes in automatic transmissions. They have the proper diagnostic tools and expertise to pinpoint the exact problem without just throwing parts at it.

Thanks a bunch for the advice and sharing your experience! I took your advice and brought the Matrix to a reputable local workshop. After extensive diagnosis, they confirmed that it was indeed the control unit and replaced it. The gear shifting is now working as expected. Again, thanks!