It's time to find a Krest that can repair your train. The following page of our Metro Exodus Solution discusses this part of the adventure step by step.
Before starting the task, it is worth visiting the place indicated on the map above. Search the wreck of the plane and you will find a compass for your glove, which makes it extremely easy to continue playing. Thanks to it, it will be much easier for you to find your next goals in the mission.
Move south to Krest's whereabouts. Along the way, you'll have to fight monsters and meet anomalies - electrical discharges that you'll have to bypass. After some time, you will reach a magnificent property - enter inside and you will be surprised by a mutant's attack.
Scroll through the place and then continue in the direction of the arrow. You will reach the big crane - jump on containers and walk forward until you reach the roof adjacent to the crane. Along the way, you will meet some monsters, but you should deal with them quite easily.
The man you are looking for will allow you to climb the mountain, but it will take some time. When the crane is lowered, you must repel the attacks of mutants. Use your Molotov cocktails and kill enemies without letting them get too close to you.
Then go to Krest and slander with him. The man will tell you about the situation in the region and give you binoculars - use it to look at the area Krest is telling you about. Go to the man's hut, replenish supplies at the table (ammunition!), and then follow the rope to shorten your journey. You'll quickly get the message that Anna is missing - it's time to help her beloved Artyom!