Når turen er slut, lægger jeg kortet ved siden af navigationen og går ind for at drikke kaffe.

Når means when in the sense of whenever / at the time that.

In this sentence, Når turen er slut means When the trip is over.

A useful contrast is:

• når = when, whenever, as a general or future situation
• da = when, at that time, usually about a specific event in the past

So if you are talking about a routine or a future-like situation, når is natural here.

Turen is the definite form of tur, so it means the trip rather than just a trip / trip.

Danish usually adds the definite article to the end of the noun:

• en tur = a trip
• turen = the trip

So Når turen er slut literally means When the trip is finished / over.

Both slut and færdig can relate to something being finished, but they are used a bit differently.

In turen er slut, slut is very natural and idiomatic for something being over / ended:

• Filmen er slut = The film is over
• Mødet er slut = The meeting is over
• Turen er slut = The trip is over

Færdig often focuses more on being done/ready/completed, especially with tasks or work:

• Jeg er færdig = I’m done
• Arbejdet er færdigt = The work is finished

So turen er slut is the most natural choice here.

This is because Danish follows the V2 rule in main clauses: the finite verb usually comes in the second position.

The sentence begins with the time clause:

• Når turen er slut

After that, the main clause starts, and the finite verb must come next:

• lægger jeg kortet ...

So Danish says:

• Når turen er slut, lægger jeg ...

not:

• Når turen er slut, jeg lægger ...

This is very common in Danish. Compare:

• I morgen går jeg på arbejde.
• Efter middag læser hun avisen.

The verb comes before the subject because something else has taken the first slot.

Kortet is the definite form of kort.

• et kort = a map / a card
• kortet = the map / the card

Here, the meaning depends on context. In a travel/navigation sentence, kortet often means the map. If the broader context involves a physical card, it could also mean the card.

The grammar is the same either way: kort is a neuter noun, so the definite form is -et.

Yes. Ved siden af is a fixed expression meaning beside / next to.

It is best learned as a whole phrase:

• ved = at/by
• siden = side
• af = of

But in practice, learners usually just remember ved siden af as one unit:

• ved siden af huset = next to the house
• ved siden af mig = next to me

So ved siden af navigationen means beside the navigation device / next to the GPS.

Navigationen is the definite form of navigation:

• en navigation = a navigation system / navigation
• navigationen = the navigation system

In real usage, navigationen often refers to a GPS or sat-nav/navigation unit, especially in a car.

The ending -en shows that the noun is common gender and definite.

Går ind means goes inside / goes in.

The small word ind adds direction and makes the movement more specific. Danish often uses these little directional particles:

• gå ind = go in / go inside
• gå ud = go out
• gå op = go up
• gå ned = go down

So går ind tells you that the speaker is moving indoors, not just walking in a general sense.

It expresses purpose: in order to drink coffee or simply to drink coffee.

The pattern is:

• for at + infinitive

Examples:

• Jeg går ind for at drikke kaffe. = I go inside to drink coffee.
• Hun tager hjem for at sove. = She goes home to sleep.
• Vi stopper for at spise. = We stop to eat.

In English, to drink coffee is often enough, but Danish frequently uses for at to make the purpose very clear.

Sometimes Danish can use just at + infinitive, but in this kind of purpose expression, for at is the normal and clearest choice.

So:

• går ind for at drikke kaffe = natural

Using only at drikke kaffe after går ind would sound less standard here or could feel incomplete. For learners, it is safest to learn:

• movement/action + for at
  • infinitive

when the meaning is in order to do something.

Because Når turen er slut is a subordinate clause placed before the main clause.

In Danish, it is standard to separate that introductory clause with a comma:

• Når turen er slut, lægger jeg ...

So the comma marks the boundary between:

1. the time clause
2. the main clause

This is very common with når, hvis, fordi, da, etc.

Yes. The subject jeg applies to both verbs:

• lægger jeg kortet ...
• og går ind ...

In more natural English structure, that is:

• I put the map/card next to the navigation system and go inside to drink coffee.

Danish often mentions the subject once and then links more verbs with og if the subject stays the same.

Yes. It is a subordinate clause, and Danish subordinate clauses usually keep the subject before the verb in a straightforward way:

• turen er slut

That part is quite similar to English word order.

The bigger word-order point is what happens after the whole clause: once the sentence moves to the main clause, the finite verb comes first before the subject because of the V2 rule:

• Når turen er slut, lægger jeg ...

So a learner often needs to notice two things at once:

1. normal subordinate-clause order: turen er slut
2. main-clause V2 after the comma: lægger jeg