DV or more commonly known as diminished value describes the economic loss of your car when it has been damaged. If your car hasn't been into a car accident, it would have a higher value on the resale market compared to if your car was damaged in a car accident and has been properly repaired.
After a car accident, keep your nerve. The police always want to reconstruct the car accident. The information is many times based on what the other driver or drivers and you provide to the police. So the police will take statements from you and the other party. Remember to be sure on the information you provide. If you change your statement later it will of course affect your case.
First of all call the emergency services if there is an emergency situation. Always take care of injured people. Avoid as long as you can to move the cars in any direction before a witness have note the cars position. But if it will cause a traffic jam or massive traffic flow problem due to the car accident, then you have to move the cars.
You can always do some things before a car accident. This article will help you be prepared for the proceedings with the car insurance company. We will give you a checklist of how you can gather as much information as possible. Every car accident has its own circumstances.