That package is a set of wheel lock bolts for a Mercedes-Benz.
What it is:
It’s an anti-theft kit for your car’s wheels (rims).
What it does:
• The special bolts replace one regular lug bolt on each wheel.
• They can only be removed using the unique key socket included in the kit.
• This makes it much harder for someone to steal your alloy wheels.
What comes in the kit (shown on the label):
• 4 locking wheel bolts (one for each wheel)
• 1 special key/socket used to remove or install them