Stefan Ertl
| Team | Ertl Martini family race event |
| residence | Burghausen, Germany |
| Occupation | Dipl.-Ing. Kfz |
| First races | Alpenpokal 2003 PORSCHE 964 RSR |
| sponsors | GTÜ, DELLIAN, Lasner Motor-Sport, Reiter Engineering, Porsche |
| sport achievements | Viele unfallfreie KM auf Porsche 964,996,997,991,992 Rennfahrzeugen |
538 Touring Car Open
| Class: | über 3800ccm |
| building year: | 2018 |
| cubic capacity: | 4000ccm |
618 Porsche Classic Cup
| Class: | PCC-Y über 3600 |
| building year: | 1991 |
| cubic capacity: | 3800ccm |
525 Austrian GT
| Class: | Division 1 991.2 und 992 |
| building year: | 2025 |
| cubic capacity: | 4000ccm |