Chambers spent last season out on loan at Middlesbrough, and he continues to be linked with an exit from the Emirates Stadium with Everton and Newcastle United said to be keen on his signature.
However, he has said that German international Mertesacker has been a 'great mentor' to him since joining the Gunners in 2014.
The 22-year-old told Kicker: "In the last few years he was my mentor. I've never seen such a professional, dedicated player, I've learned from him every day. He kept me on track, reminded me of the little things that brought you where you want to go. He's a great guy.
"To learn from such a player and such a personality – I could not have done better. I just got better because I could train at his side every day."
Chambers has made a total of 59 appearances for Arsenal since they paid £16m to sign him from Southampton.