The mercedes given to is fully armored
"Can't imagine what you'd need missile-proof glass and four thousand pounds of body armor for around here."
-One of the two men Bella meets at the gas station commenting on Bella's Mercedes Guardian-
The Mercedes Guardian is Bella's "before" car in Breaking Dawn. It is described as sleek and shiny. The car is a gift to Bella from Edward to replace Bella's truck. It is said to be missile proof with full body armor. It is supposed to be released into Europe and extremely expensive.
This is a fictional car based on the real Mercedes S-Guard.
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It also has four thousand tons of body armor. One of the two men bella meets at the gas station says that you could run a tanker over it and still not damage it.