This is the 15511th most frequent Turkish word.
tamirhanesinde
"In his/her/its repair shop."
In this sentence, 'tamirhanesinde' is used to denote the location where the car is left, which is the mechanic's workshop.
Otomobilini ustanın tamirhanesinde bıraktı.
He left his car at the mechanic's workshop.
Here, 'tamirhanesinde' refers to someone's own workshop as a place where an event (meeting friends) is planned to occur.
Tamirhanesinde arkadaşlarıyla buluşmayı planlıyor.
He plans to meet his friends at his workshop.
In this case, 'tamirhanesinde' indicates the setting of the action, where the worker is performing machine checks at the workshop.