When I turn the Headlights on in the 1981 240D it takes about a second or two before the headlights go on.

Did I just not notice this or is something failing? I don't want to sit back and wait for them not to work when my Teenager is trying to drive home at night.

Thanks

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1981 240D Four on the floor, Orient Red over Parchment, bought with 154,000 but it's a daily driver and up to 180,000 miles, mostly original paint and all original interior.