Thanks for the advice- have tried it all to no avail. The intercom worked perfectly until the first service. The only thing I haven’t done is wire it straight to the factory harness (I use accesory socket – either via Canbus or direct to battery via additional harness) as I don’t feel too confident playing around with the wiring for fear of botching it up. I will explore that avenue when I take the bike for its next service to an accredited BMW dealer.

Thanks again
Richard