The Illia's place was clean and comfortable. It is a brand new apartment located in a quite and nice area near park and Promenade, walking area beside the river channel. Few minutes walk from tram and bus stops, and very close to metro (Ubahn) line U4. Close by there is Brigittaplatz underground parking for 8-10 Eur for 24-hours, where you may safely leave you car for few days. Since IMHO you will not need a car to move around Vienna, just use a well organized public transport.