What does the + - mark on the back of the car handle do?

I'm looking at the picture of the car and there's a bar behind the handle with a + - mark.

What role does this play?

1846 2016-06-25 Gentleman

popular How can I connect to watch a video on my phone on TV?

popular How can I resolve TLS security configuration errors?

popular What are the side effects of oats?

popular Can I listen to music with Bluetooth earphones on the plane?

popular What is the nationality of Minnie?

Same Tag What percentage of a car would be appropriate for an annual salary?

Same Tag If I use Kakao Map navigation, does it tell me the speed limit control camera?

Same Tag What does the letter R stand for on the car's gear bar?

Same Tag What is the order of the accelerator and brakes of the right-handled car?

Same Tag Do I have to pick up the car I bought directly at the sales office?

Same Time Do domestic cars have information like zero bags?

Same Time What does the + - mark on the back of the car handle do?

Same Time Please recommend a Milmyeon restaurant