1993 was a really transitional year in DTM history. They accept the Class1 rules (2.5 V6 engines, more freedom to modify chassis, aerodynamic, etc), but only the Alfa has a Class1 car the 155 V6 Ti. At the last round of the season debuted the Opel Calibra V6.
All the other cars are not running under Class1 regulation.
There was Class2 cars Opel Astra, and Alfa 155 Supertourers.
There was a Linder BMW E36, I don't know which regulation.
A lot of "old" BMW E30 and Mercedes Evo2, and one Ford Mustang, and one Opel Omega. All was running under the old DTM regulations.
And this Mercedes 190 Evo2 is run that reg too. Used to say it is a 190 evo2 class1, but it has the same Mercedes Cosworth 4 in line engine that was used in 1992. The engine was placed lower a bit, the car got new front bumpers, and rear wings and wider tracksize, so they must made new fenders for the car.
If you intrested some technical data of the DTM cars from 1984 to 1996 there is closed website, digged out from webarchive.
http://web.archive.org/web/20070703...Tourenwagen/DTM_84-96/DTM_Technik_1.html#1993
And here is the link with the whole Mercedes 190 history in DTM.
https://mb190e16v.com/dtm/
(This page has a lot more photos in the former verision. I don't understand, why people making websites to look like more trendy, and during it losing a lot of good old infos pictures......)