Riley is writing a report about safe vehicles. He is using information from this Web article and would like to paraphrase the following sentence from the article.

The car looks like an ordinary Mercedes on the outside, but it is made with materials strong enough to resist explosions from firearms and hand grenades.

Which of the following is the best paraphrase for this sentence?
The extra-thick steel and bulletproof glass of the Mercedes S600 Guard make it impossible to damage (Singh 2010).
The Mercedes S600 Guard has the appearance of a regular Mercedes; however, its tough construction enables it to withstand blasts (Singh 2010).
Even though the car looks like an ordinary Mercedes on the outside, it is strong enough to resist explosions from firearms and hand grenades (Singh 2010).
The car is made with materials strong enough to resist explosions, but it looks like an ordinary Mercedes (Singh 2010).