The current age limit for Au Pairs in Germany is 27 years. You could alternativley become an Au Pair in Austria where the age limit is 28 years. Please not that you have to be at least 18 years old to become an Au Pair. 

Yes. For your protection and that of the Family it is advised you sign a contact clearly stating your duties and what you are entitled to. You would also need a contract during the visa application process as well. Please read through the contract well. 

Au Pairs in Germany do not receive wages as such, but do receive “spending money”. This totals 280 euros per month. In general, au pairs must pay their own expenses for travel to and from the host country.

The au pair relationship must be at least six months long, and may be a maximum of one year. The au pair may not be hired again by the same family, even if the maximum term of one year has not been reached.

In general, the au pair may not perform household duties (including watching minor children) for over six hours daily or over 30 hours per week. This limit may only be exceeded on certain occasions by prior agreement. Overtime hours must be compensated with time off.

All au pairs must have the opportunity to take part in a German language course during their free time and attend culturally and intellectually interesting events. Host families are obligated to pay 600 euros of the cost for the language course. This supplement may be paid out to the au pair at a flat rate of 50 euros per month, and must be paid for the entire duration of the au pair relationship, or may be paid as a one-time lump sum of 600 euros. The au pair must, however, bear the cost for other events themselves.