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Message: <blockquote data-quote="Schwepps" data-source="post: 364010" data-attributes="member: 3592"><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> Don't think so bro. That would be an inertial guidance system with gyroscopes to sense distance and direction similar to SCUD missiles. Way too expensive and probably not allowed to be put in a public device. :wink: Even GPS was developed by the US military and accuracy for public use is limited to 5m or something like that. We would forgive BMW, like we forgive Hitz.fm and Maxis, if the signal can't be received in tunnels and basement carparks, so why would they add that expense into something that we don't even use 95% of the time?It's not as if we can take a wrong turn in a tunnel, and if we're already in a basement carpark, we should know which building we're in already. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" /> Inertial guidance would be redundant.</blockquote>