AutoScope recommends that you check under your hood periodically. Squirrels like to make shelters underneath the hood because it is warmer than it is outside. A sure sign you have a squirrel problem are the remains of acorns. It is not just squirrels you need to look out for though. Birds and other critters like to build nest in your engine compartment as well. Having any type of debris near your engine is potentially hazardous and needs to be removed. Even though Mercedes-Benz, Audi and BMW’s have engine covers this is still a potential issue. Make sure you check frequently!