In Germany you are obligated to carry a first aid kit in your car, and you also have to take a first aid course (or "basic life support at the scene of an accident") to get your drivers license.

The contents of the first aid kit are even regulated in a norm (DIN 13164):

1x role of tape (2.5 cm x 5 m)
8x bandaid (10 x 6 cm)
3x sterile gauze bandage with smaller dressing (8 x 10 cm)
1x sterile gauze bandage with larger dressing (10 x 12 cm)
2x sterile dressing (40 x 60 cm)
1x sterile dressing (60 x 80 cm)
6x sterile dressing (10 x 10 cm)
2x gauze bandage (6 cm x 4 m)
3x gauze bandage (8 cm x 4 m)
2x triangular bandage
1x emergency blanket
1x pair of EMT scissors
4x gloves
1x first aid brochure

You also have to carry a reflecting warning triangle to secure the scene of the accident as well as at least one reflecting vest in your car to guarantee your own safety when walking along the road.