Robert Trujillo and Kirk Hammett played a cover version of RAMMSTEIN's "Engel" during METALLICA's July 6 concert at Olympiastadion in Berlin, Germany. Fan-filmed video footage of the performance can be seen below.

"Engel" was part of the fun and unusual feature METALLICA added to its shows on the band's recent tours: at each stop, Hammett and Trujillo have been covering songs from some of their musical heroes — often choosing songs that are far removed from the band's traditional metal sound. The "doodles," as the band refers to them in their setlists, have been showing up right before Trujillo's solo on "(Anesthesia) Pulling Teeth". The songs are pared-down interpretations — just bass and guitar and sometimes Trujillo singing in front of music stands.

METALLICA is continuing to tour in support of its latest album, "Hardwired… To Self-Destruct", which debuted at No. 1 on The Billboard 200 album chart, selling 291,000 copies in its first week of release.

The "WorldWired" tour has played more than 130 shows across the world since its 2016 launch.

Last November, drummer Lars Ulrich told The Mercury News that the trek could last through early 2020.