That is the MGR equivalent of a single tuner BM24
Nearly every standard BMW part can be used in the Rover but as rule the firmware in each unit is either crippled or years behind current BMW units

I am not sure how far Jochen has got with this but hopefully we will be able to recode Rover units with BMW updates one day soon i.e the Rover Mk3 nav comp

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Keith Alexander
Rover 75 CDT Connoisseur Se, MG ZT+T 190, MG ZT 260
Ellesmere Shropshire England