Where can i find the engine & chassis number of audi Q7 2011 model?

The chassis number is usually the last 6 on the VIN, it is also located on a data plate inside the drivers door in most cases, on a data plate under the hood riveted on the body. The engine number is usually pressed into the block itself under the intake manifold. You can get this from the VIN as well as it is usually the series of numbers at the end with no letters in it. If your talking about the engine type code you can get that from the VIN as well but you have to take two 2 digit code from the VIN and reference that to get the actual type that was installed.