Angus,
Wouldn't it be the other way around? Right arrow for LHD? You said so yourself:
[quote:437413894b]I jest went out and had a look at the cars in the driveway; my Australian spec '74 164 has lights coded E2 (France), with the right arrow.
My father's '85 265 has lights coded E5 (Sweden), also with the arrow pointing right.
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I was getting nervous again as I don't have the arrow on mine and still having issues...pretty sure it's the wiring and haven't had time to fix. Here's a clip off of Dan Stern's page.
[quote:437413894b]Here is how to read ECE traffic-direction markings:
---> Low beam is suitable only for use in Left Hand Traffic (e.g., Britain, Australia, Africa, Japan)
NO ARROW Low beam is suitable only for use in Right Hand Traffic (US, Canada, Continental Europe, Scandinavia, Russia, etc.)
<--> Low beam is adaptable for use on either side of the road (many projector lamps and older pre-H4 tungsten high/low lamps) Note, an arrow means something different for signalling functions, including turn signals, Daytime Running Lamps and parking lamps (city lights, sidelights, position lamps) than it does for a headlamp beam. For signalling functions, an arrow indicates the side of the car for which the lighting device meets the relevant ECE technical specification. The specifications for signalling devices call for specific horizontal angles of visibility through which the device must be visible. This is so that the device can convey its message to everybody who needs to see it. So if you find an arrow near an 'A' mark on a front lamp cluster, it refers to the side of the car for which the parking lamp built into that cluster is approved, and not the traffic direction for which the headlamp in the same cluster is intended.
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Best,
Adam