On my 190E, the parking brake is on the driver's side.

With the parking brake being a drum brake, it does require grease to keep the parts moving freely. The symptoms I had included a very loud banging sound from the back left side of the car - one bang for every time the wheel turned. The other symptom included very little braking action when I pulled up on the handle of the parking brake.

Basically the shoes on the parking brake had worn and the the parking brake needed to be adjusted. In this model (190E), when you pull the parking brake handle far enough, the mechanism to force the brake shoes apart was getting hit by one of the wheel lug bolts. It stayed that way after I released the parking brake because the parts needed greased (years ago).