1. Wide Range of Vehicles: Offer a diverse fleet of vehicles to cater to different customer needs and budgets. This could include economy cars, SUVs, luxury cars, and even specialty vehicles like vans or buses for group travel.

2. Online Booking System: Implement a user-friendly online booking system that allows customers to easily reserve vehicles in advance. Ensure that your website is mobile-friendly and optimized for easy navigation.

3. Transparent Pricing: Clearly display your rental rates, including any additional fees or charges upfront. Transparency in pricing helps build trust with customers and reduces the likelihood of disputes later on.

4. Excellent Customer Service: Provide exceptional customer service at every touchpoint, from inquiries and reservations to vehicle pickup and drop-off. Promptly address any concerns or issues that arise to ensure a positive experience for your customers.

5. Convenient Pickup and Drop-off Locations: Have multiple pickup and drop-off locations throughout Delhi to make it convenient for customers to access your services. Consider offering delivery and pickup options for an added level of convenience.

6. Vehicle Maintenance: Regularly maintain and service your fleet to ensure that all vehicles are in optimal condition. Cleanliness and safety should be top priorities to provide customers with a comfortable and worry-free rental experience.

7. Marketing and Promotion: Utilize various marketing channels such as social media, online advertising, and partnerships with local businesses to promote your car rental services. Offer special promotions or discounts to attract new customers and encourage repeat business.

8. Legal Compliance: Ensure that your car rental business complies with all relevant regulations and licensing requirements in Delhi. This includes proper insurance coverage for your vehicles and adhering to local laws regarding rental agreements and vehicle safety standards.

By focusing on these key areas, you can establish and grow a successful car rental service in Delhi that meets the needs of both local residents and visitors to the city.