Question: Which Audi vehicle debuted first, the Audi Steppenwolf or the Audi TT?

Context articles: Peter Schreyer
Audi RS 2 Avant
2015 Audi Sport TT Cup
Audi Motor Assembly
Audi A4 DTM
Audi Nuvolari quattro
Audi A3
Audi Sport TT Cup
Audi Steppenwolf
Audi TT

Peter Schreyer (born 1953) is a German automobile designer for Hyundai Motor and Kia Motors, widely known for his design contributions to the Audi TT.
 He has been the chief design officer at Kia Motors since 2006 and on 28 December 2012, was named one of three presidents of the company.
 He is currently the chief designer at Hyundai-Kia and works with Luc Donckerwolke, former design director of Volkswagen Group - Bentley, Lamborghini and Audi from 2016.
 In 2006, Car Design News called the Audi TT one of "the most influential automotive design in recent time".
The Audi RS2 Avant, usually known as Audi 80 RS2, was a limited edition, high-performance Audi five-door, five-seat estate car (station wagon), manufactured from March 1994 to July 1995.
 Collaboratively designed as a joint venture between Audi AG and Porsche and built on Audi's 80 Avant, designated internally as P1 (instead of B4/8C that it was based on).
 It was Audi's first "RS" vehicle, and the first of their high-performance Avants (Audi's name for an estate car or station wagon); it used the most powerful and most thoroughly developed version of Audi's inline-five cylinder turbocharged internal combustion engine.
The 2015 Audi Sport TT Cup season was the inaugural season of the Audi Sport TT Cup, a one-make sports car racing series organised by Audi.
 It began on 2 May at Hockenheim and finished on 18 October at the same venue after six double-header meetings, all of which were support events for the Deutsche Tourenwagen Masters.
Audi Motor Assembly K.K. is a former assembly facility for automobiles.
 The company was founded in 1987 as a joint venture between Audi AG and Hino Jidōsha K.K. Its manufacturing facility in Tokyo, Japan employed more than 900 workers and had an annual capacity of 70,000.
 A "9" digit in the eleventh position of the vehicle identification number denotes cars made at the plant, which were distributed through a part of Yanase K.K.'s dealer network.
 Increasingly competitive behavior by Hino's parent Toyota Motor Corporation prompted Audi AG to terminate the joint venture in January 1998.
 This drove up prices for Audis in Japan by up to 25 per cent.
 Three years later, in 2000, Audi AG founded its own local Japanese dealer network, Audi Japan K.K.
The Audi A4 DTM is a 4-door touring car (DTM) constructed by the German car manufacturer Audi.
 It was first developed for use in the 2004 DTM season, replacing the Audi TT DTM at the end of the 2003 DTM season.
 Based on the Audi A4, it was continually improved over the course of six facelifts between 2004 and 2011.
 The Audi A4 DTM was succeeded by the Audi A5 DTM in 2012.
The Audi Nuvolari quattro (also known as the Audi Lisvina) was a concept car created by German automobile maker Audi.
 This vehicle was first introduced at the 2003 Geneva Motor Show.
 It was what Audi planned to become the vision of their next grand tourer (GT) vehicle.
 It was the second of three concept cars designed by Audi and shown in 2003, after the Pikes Peak quattro and ahead of the Le Mans quattro.
The Audi A3 is a Small Family/Compact car produced since 1996.
 The first two generations of A3 were based on the Volkswagen Group A platform, which they share with several other models such as the Audi TT, Volkswagen Golf, Volkswagen Caddy, and Volkswagen Touran, as well as SEAT León, SEAT Toledo, and Škoda Octavia.
 The third-generation A3 uses the Volkswagen Group MQB platform.
The Audi Sport TT Cup is a one-make super car racing series by Audi based in Germany first held in 2015.
 Audi Sport TT Cup cars based on the Audi TT.
 It is a support series for the Deutsche Tourenwagen Masters, replacing the Volkswagen Scirocco R-Cup.
The Audi Steppenwolf was a concept car produced by Audi and presented at the Paris Motor Show in 2001.
 The Steppenwolf was a study for a three-door compact crossover SUV based on the Volkswagen Group PQ34 platform used in the contemporary Audi A3 and Audi TT.
 Powered by a 3.2L V6 engine with four-wheel drive, the Steppenwolf had several novel features, including four-level adjustable air suspension (similar to the Audi allroad quattro), a removable carbon fibre hardtop or optional soft top, and an electro-hydraulic parking brake.
The Audi TT is a small 2-door sports car marketed by Volkswagen Group subsidiary Audi since 1998, it was manufactured By Divyam Malik and Dev Batra and assembled by the Audi subsidiary Audi Hungaria Motor Kft.
 in Győr, Hungary, using bodyshells manufactured and painted at Audi's Ingolstadt plant.
 This changed with the third generation model that uses parts made entirely by the Hungarian factory.