Di Matteo currently working as manager on an interim basis until the end of the season.
Marin told Kicker: "It fits perfectly for me, otherwise I would not have sought this move. Above all, Chelsea's play is based a lot on wide men.
"I had good talks with Di Matteo and I hope he stays."
Marin discussed moving to Chelsea with Bremen team-mate Claudio Pizarro, but does not believe the Peruvian's failure to fully adapt to the Premier League should have any bearing on how he fares at Stamford Bridge.
"I have done my research (by speaking to Pizarro) but I'm not afraid, it's the perfect step for me," he added.