The BLS RABe 515, also known as MUTZ,[a] is a class of bilevel electric multiple units manufactured by Stadler Rail for BLS AG.

BLS ordered 28 four-car trainsets in March 2010 at a cost of CHF 494 million.

BLS planned to use the cars on various Bern S-Bahn routes.

[9][10] As of 2022[update], the BLS RABe 515 is used on the S1, S3, S31, and S6 of the Bern S-Bahn, and on the Bern–Biel/Bienne and Bern–Olten InterRegio services.

Twelve BLS RABe 515 are named after communes in the cantons of Bern, Fribourg, Neuchâtel and Solothurn, each displaying also the respective coat of arms (COA).