Google translation of that article:
Replacing the tires in F1 gained added significance when abandoned refueling during the race. The last race showed that the second in the pits can decide victory or defeat. Teams of mechanics more than they practice driver that comes when the right moment to do what is theirs. Last season the fastest Red Bull changed the mechanics and for them to the existing record 2.8 seconds. After all, over the whole season had the lowest average Mercedes team, who this season seem to be behind the best.
In addition to proper selection of the crew members responsible for the replacement tires (Red Bull used a psychological test), focus was also the "gadgets" used by the team. Ferrari was the first chosen to replace lolipopman specially designed system of lights, the original version of the minor modifications to work today.Other teams also have equipped their technicians in equipment to improve the process of replacement tires (the buttons on the gun signaling the completion of work). Mercedes also has invested in the nuts embedded in the alloy, which reportedly cost a fortune, but can be a mystery so fantastic results.
In Spain, came to light yet another novelty. Red Bull team uses a laser beam for direction on the driver's field of service. This sounds quite cosmic, but the picture posted by Adam Cooper, twitter, and a part of an official summary of the race in Malaysia seem to confirm this bold theory. The laser beam appears in the garage of Red Bull when changing tires.
What you see above is the result of the positioning system. Engineer responsible for identifying the point of stopping the car (front wheel), set in such a way that the radius of the cast from the top hit in one of the two circles on the upper plate-held by him. This point is determined according to the place where the mechanics lined up with guns. Their position is likely to be monitored by sensors placed on the outriggers located above the field replacement of tires.
If the driver does not commit an error and stops at the place designated by the label, the engineer will always have the car set in the same position. Even a minimal difference in setting your car may require the change of position by a mechanic, and thus the loss of valuable fractions seconds. Of course what I outlined above could be part of a more sophisticated system.