Mercedes will join Audi and BMW for the DTM Series rookie test at Jerez.
This will be the last time the three manufacturers who contested the 2018 season together will share the same tarmac.
HWA AG the long-time development and operation squad for Mercedes will be conducting the test with the Mercedes machinery.
Dani Juncadella will be on hand as a reference for the team.
Jake Dennis, Jake Hughes, Thomas Preining and Ferdinand Habsburg have been nominated for the test.
However, Habsburg is a surprise given it had already been announced he would test for Audi.
For the Ingolstadt based team, Andreas Bakkerund, Benoit Treluyer, Frederic Vervisch, Mattia Drudi and Jonathan Aberdein have been announced for the test.
Sacha Fenestraz has been drafted in at the last minute to replace Habsburg.
Aberdein and Fenestraz will be testing for WRT, the first customer team in the new era that the DTM is entering.
The Belgian team is best known for securing numerous race wins and championships with the GT3 racer Audi R8 LMS.
WRT Team Principal, Vincent Vosse, told DTM.com: “The tests at Jerez represent our first opportunity to work with a 2018 spec in the DTM environment.”
Furthermore, he also said the two WRT drivers for 2019 will be announced in late December or early January.
BMW will field, works driver Nick Catsburg alongside Mikkel Jensen, Sheldon van der Linde and Nick Yelloly.
The Munich based manufacturer has one seat available for 2019 following the departure of Augusto Farfus, as well as the confirmation Timo Glock, Bruno Spengler, Marco Wittmann, Philipp Eng and Joel Eriksson remain with the team.
Eng will be on hand as a reference to the quartet.
As well, BMW will use a 2018 spec car and a ‘Class One‘ prototype for the tests. Spengler and Wittmann will be testing the latter.
The new R-Motosport team who make their DTM debut in partnership with Aston Martin and HWA will not be present at the test.
The test takes place 10-12 December.
