Montermini himself crashed heavily in practice for the 1994 Spanish Grand Prix, breaking his left heel and his right foot.

For the 1997 season Montermini was signed as test driver for the MasterCard Lola team,[2] but it folded after one race.

When others such as Alex Barron, Gualter Salles and Raul Boesel were replaced, he filled in and scored a best finish of 11th in Vancouver.

In 2006 he has occasionally raced alongside Jarek Janis and Sascha Bert in a Saleen ran by the Zakspeed team.

In 2007 he won the International GT Open's GTA class, driving a Ferrari 430 for Scuderia Playteam alongside co-champion Michele Maceratesi, the duo becoming overall champions the following season.