Which statement is right?

1. A wire does not need to be marked with the temperature and voltage rating if a serial number is printed on the wire that is clearly bound to the wire characteristics for example by a datasheetCorrect
2. The temperature ratings for TS wiring must be at least 90°C
3. The maximum low power voltage that can occur within any component of the car is less than 600V.
4. The seat mounting points do not need to be grounded since no TS component is within 100mm present.