Nope the advice of BBK (Federal office of civil protection and disaster assistance) recommends to have consisted stocks for 11 days including water for drinking, basic hygiene and cooking.

Germany’s advice for normal times is to be stocked up for 11 days. 3 Days compared to that is laughable even so it is better than 0.

You can’t buy a car that had its model registration in the EU after 2019 in the EU that hasn’t a SIM Card installed as it is part of an EU legislation.