Answer
Firstly, kompressor indicates that the benz is turbocharged. brabus is an independant tuning company that specialises in ground effects, engine mods, suspensions and other miscellaneuos things. amg is the inhouse mercedes-benz tuning company. they specialise in pretty much the same as brabus, although they are also into racing. other companies worth honourable mention are kleeman and clarrson, who do only benzes. peace.