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Hi:
I still intend on checking this out, I believe the best resource will be a 2002 owners manual. Just been swamped lately installing snow tires and other winterization stuff, plus a few big projects for the shop.
I wasn't working on the ML that the owner wanted the DRL's on, but I know there was a big problem, wouldn't work. I believe the fix was to download the version programming from an ML55 into this guys AAM, I am unsure what the exact model was that was being worked on, must have been either a 320 or a 500. But I can't remember if the downloading from a ML55 was to just get everything working normally again, or if it actually got the DRL's to come on.
In the US, the biggest proponent of DRL's is GM, whether all the DRL systems in the US all work the same I don't know, but I have a Buick and my wife has a Blazer, both with DRL's. On our vehicles, the DRL's come on when the car is started and that's all. I just checked my wifes Blazer, and yes, they turn off if the parking brake is set. On the Blazer, it seems like the DRL bulbs shut off when the headlights are turned on. The DRL's remain on when the parking lights are turned on, then you will have DRL's, front park lights and tailights, plus intrument illumination.
On my Buick, the DRL's are also the front turn signal, so they are amber colored, they remain on when the headlights are turned on. The Blazer DRL's are in the bottom section of the headlight, they do appear like a dim headlight, not bright white but I don't believe the bulb is tinted at all.
I don't believe any of the US cars DRL's are affected by gearshift position.
Hopefully I can get a clearer view of how the ML DRL's operate either by the owners manual or we finally get them operating on a 2002.
Gilly
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