What is the fine-grained topic of the following text: The South African Motoring Guild voted the new OPEL ASTRA as the South African ‘Car of the Year for 2017’ after the new ASTRA was awarded ‘Car of the Year’ in 12 European countries, as well as ‘Overall European Car of the Year’. Only return the topic.
OPEL ASTRA winning South African 'Car of the Year for 2017' award