Concepts, sometimes the most fun part of auto shows, aren't always about new vehicles. Sometimes they're just a play on an existing model. At this year's Frankfurt Motor Show, BMW offered up an interesting variant on it's X5 SUV, the X5 Security Plus Concept.

The luxury SUV market couldn't be more competitive, and BMW is setting it's sights on Mercedes-Benz. After it's biggest SUV was outsold by Mercedes last year, BMW is determined to regain it's luxury crown with a new version of it's X5.

When it comes to the X5, BMW has always been innovative. Remember, BMW created the SAV segment back in 1999. Improving it's athleticism in 2007, the company even went so far as to launch an M version with three powerful engine choices. 1.3 million units later, the BMW X5 will once again set the standard for driving dynamics, luxury and versatility. Unveiled at the end of May, the third generation of the X5 Sports Activity Vehicle (SAV) is expected to hit dealerships in November of this year. Refining things, the 2014 X5 has lost weight. Losing 200 pounds, it's more aerodynamic. Under the hood, three engine options are available- a six cylinder 3.0 litre single turbo with 300 horses and 300 pounds of torque, and a 4.4 litre twin turbo V8 that gets 455 horsepower and 480 pounds of torque.

BMW has filed to trademark 48 new model names; generally speaking, it’s a festival of ‘i’s, ‘X’s and numbers. The exercise is part of a strategy to better define a number of upcoming electric variants, as well as to identify some new vehicles.