I've started using the European parking light feature in some instances and I am currious how long this feature can be on for before causing a noticable drain on the battery? I imagine that the draw is minimal but I don't want to end up stranded.

The feature I'm talking about is when you turn off the car, then engage on side blinker, then turn off the headlights. It illuminates the designated side parking lights. Thanks!

 

Really depends on how much driving you did prior to shutting the car off.
On an ample charge on a new battery, i would guess 3 hours and the battery
*may* show a slight change in voltage. Car should start right away.

I bet you can go up to 12hours and still be able to start your car...but your
battery will prematurely die if you keep draining it more than 40% from full
unless you get deep cycle batteries.

 

In most European countries you are required by law to use the side marker parking lights, specially in very narrow, tight and dark streets. In most instances you have to leave the nights on all night long.

I doubt this poses a problem in terms of battery durability.