Hey guys, Sorry for the dumb post... I'd like to know what these are and what they do. Especially the slider and the button on the #3

 

1,3, and 4 are all aftermarket. If possible ask the previous owner. My guess would be radar detector (1,3) and a bluetooth mic(4)

#2 is for the auto on headlights if your car has them which it probably doesn't

 

#3 and #4 look like parts for an old aftermarket bluetooth phone system. #3 looks like it has a speaker on the front of it with a volume control **** on the side. Not sure why there is a button on top, perhaps to mute it or turn it on? I agree #1 looks like a dash mounted radar detector.

 

#1 is a GPS antenna.

 

When I switch on the ignition the lights are on automatically in the night time while they stay off in day time. Yeah I think it has auto on headlights.. #4 doesn't seem like a mic. It has a numbered slider. check below pic

 

Where does that wire connect to? It might be part of aftermarket interior lighting the previous owner had.

Very mysterious. I agree that 3 looks most like a handsfree phone solution from another century.

 

That number slider could be a sub woofer gain control ****!

 

Recently noticed that when I press the Button on #3, auto headlight feature works. When I release it I have to turn the lights manually.

 

It appears the mystery to #3 is solved. It appears to be an auto on headlight sensor. The button on top turns it on and the dial on the side should adjust the sensitivity of the sensor.