I see that Carpuride has a BMW version of their CarPlay unit. Does anyone know if the BMW mount that is mounted on the bike able to be used or do they have one for a C400GT so you can use the wonder wheel?
I don't know.
I'm a newbie to this CarPlay world myself, not an expert at all, but I've done some research that you may find useful, anyway.
1) Cheap System:
To dip my toes into the realm of CarPlay (which I don't even have in my car), I bought a cheap unit from Aoocci:
https://aoocci.com/products/c6-pro-motorcycle-dash-cam?variant=42251602198616 . I installed this on my Royal Enfield Meteor 350:
With a coupon -- and there are coupons for all of these systems, present in YouTube descriptions or if you get on their mailing lists -- I spent $170 (including shipping).
In addition to checking out CarPlay, I wanted TPMS sensors. For other bikes -- including my C 400 GT -- I've purchased FOBO sensors, and they're about $100 all by themselves.
(As it turns out, I've compared the sensors that came with the C6 against the FOBO sensors and some digital gauges I have, and they're very accurate. However, the C6 is very disappointing in this respect, once on the move, i.e., after a pre-ride check in the garage: the display shows tire pressure in an extremely minuscule font, a real eye test. The designers who worked on that particular display ought to be fired, IMO.)
2) Carpuride:
The somewhat BMW-compatible system doesn't look as if that compatibility has anything to do with the Wonder Wheel.
From my understanding, all that means is that if you have the "satnav prep" on a Beemer, the unit gets its power from that BMW mount, and gets to be locked in place with that unit's key.
I base this on the info at
https://carpuride.com/products/carpuride-w702b-motorcycle-stereo-with-navigation-bracket . Further, regarding the two videos on that page ...
... and ...
... neither one mentions the Wonder Wheel (I used YT's auto-translate for the German one). Again, both of those touch on the satnav prep for power and locking, but that's it.
3) Chigee:
Moving (way) up the ladder in terms of expense, there's Chigee's AIO-5, for instance:
https://www.chigee.com/products/aio5-play-for-bmw , which states:
It also features native integration with real-time engine data, WonderWheel control, tire pressure monitoring, and anti-theft protection for a smarter, safer ride.
And then it goes on to say:
Check compatibility with your BMW at here
Doing that takes you to
https://www.chigee.com/pages/aio5-play-bmw-compatibility . Here's a partial screen grab of that chart, and I've circled the relevant cells:
As you can see (or so it looks like to me), for the C 400 GT you need to buy an additional product,
https://www.chigee.com/search?q=CGRC+CAN&type=product ($99), or maybe you can get away with just having the dealer set some option (or do it yourself, if you have one of those firmware-updating devices).
That last bit isn't at all clear to me but, as I say, I'm new to all this.
4) Satnav Prep:
In the post
https://www.bmw-scooters.com/threads/preparation-for-gps.3535/ ,
@B0BUK81 asked just today whether that satnav prep mounting device can be added to the C 400 scooters.
I have no idea about that, either. If it can, that would solve the power and locking option, I guess. My guess is that the C 400 bikes are the red-headed step-children in Beemerdom, and that you can't do that. But that's only a guess on my part, and I could be wrong; in my three years on the forum, I don't recall reading about anyone's doing this.
That's all I got. Good luck to one and all in your quest for information, future experimentation, etc.