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Town mayor Gerhard Herbert had already announced Vettel would be made an honorary citizen of the town.
Tens of thousand of motorsport fans from the region are expected to flock to Heppenheim for Sunday's celebrations. A show event in the summer featuring Vettel attracted some 120,000 people to the town which has a population of 25,000.
Vettel, who lives in Switzerland, will travel to Heppenheim from test drives with Red Bull on Friday and Saturday in Abu Dhabi.
Source: Planet-F1