What must you do now?

Your answer is correct because in Germany, when you need to create an emergency corridor (Rettungsgasse) for emergency vehicles on highways or multi-lane roads, vehicles in the leftmost lane must move as far to the left as possible, and vehicles in all other lanes move to the right. This leaves a clear lane in the middle for emergency services to pass quickly and safely through traffic jams. Moving to the right, as other lanes do, or staying in the center would block or narrow the corridor, delaying emergency response. So, the rule is simple: if you are in the left lane, go as far left as you can; if you are in any lane to the right of that, move to the right. This ensures a proper emergency lane is formed.