| 6.5.3. | Neither the cleaner nor any part of it shall prevent the adjustment of the headlamp and the replacement of the filament lamp. In case of need, the cleaner or part of it shall be removable with simple tools. No other prescribed or permissible lighting or light-signalling devices shall be impaired in their effectiveness either by parts or by the operation of the headlamp cleaner, except during the cleaning period; it must above all not systematically deposit any dirt when in normal service, on the light-emitting surfaces of other lighting or light-signalling devices; | a0c0 |