Join Date: Jan 2016
Location: Herefordshire, UK
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To display the altitude and GPS calculated speed on the full screen map you would have to install firmware hacks (sometimes called tweaks), it's not something that can be turned on or off in settings. There are topics regarding tweaks over on the mazda3revolution.com forum if you're feeling brave.
Without hacks, you can view your altitude under a narrow section of the map as you drive, by selecting the "Where am I?" option from the map screen.
P.S: I don't know what the rules are in other countries, but in the UK a vehicle's speedometer reading is not allowed to be lower than the actual speed, it has to be accurate or over-read by no more than about 110% of actual speed.
09/15 CX-3 Sport Nav, Dynamic Blue Mica, 1.5 Diesel, AWD, Automatic
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Last edited by jtonline; 07-22-2017 at 07:21 PM.