all devices having one or more common characteristics or functions. They are classified as follows: Class I: Interior rear-view mirrors, giving the field of vision defined in item 5.2 of Annex III. Classes II and III: 'Main' exterior rear-view mirrors, giving the fields of vision defined in item 5.3 of Annex III. Class IV: 'Wide-angle' exterior rear-view mirrors, giving the field of vision defined in item 5.4 of Annex III. Class V: 'Close-proximity' exterior rear-view mirrors, giving the field of vision defined in item 5.5 of Annex III.