Mini Cabrio Automatic Gearbox Issues

That sounds suspiciously like what happened with my Mini a while back – though mine's a different year. Check engine light, transmission light, and some nasty slippage. Did you notice any grinding when it shifted? Error codes are a dead giveaway, too. I'm leaning towards a converter fault as well.

Grinding is present, plus error stored in the error memory. You mentioned a 'converter fault' – was it the lock-up clutch specifically? And did you have similar symptoms on your automatic gearbox, like unclean shifts?

Yep, lock-up clutch in the torque converter was precisely the culprit. The symptoms sound identical – especially the inconsistent shifts. If you're getting grinding too, and the error codes point that way, I'd say it's time to get it properly diagnosed at a workshop. Don't delay it too long, or you risk further damage.

Just wanted to update on this. You were spot on. My suspicions about the torque converter were confirmed. Ended up costing me 2120€ for a transmission repair. Ouch. But at least my Mini Cabrio, with almost 200000 km on the clock, is shifting smoothly again. Thanks for the input!