One of the side missions in Metro Exodus requires you to find a guitar. On this page, you will learn what you have to do to get it.
Go south of the tracks - you will reach the place with a guitar. This item will be a perfect gift for Stepan.
The guitar is on the tower. Getting there without killing anyone is very difficult. There are a few bandits on the ground floor. You can't eliminate them - if you do that, the enemies at the top will notice you. Throw cans do distract the bandits and lure them away from the stairs.
Go up the stairs.
Keep eliminating the enemies while you are moving up.
Look around carefully - there are a lot of valuable resources in the tower.
Pick up the guitar and go back to the train. Don't jump down from the tower or you will die.