VolVo V70 rattles front left in idle

Hello guys, with my V70 (Bj 98, 2.5 TDI, 140 HP) I have had a number of problems for a long time: 1.) At a low engine speed (usually around 1000) in idle mode as well as during braking I have a “sheet” sound at the front left, which sounds very unhealthy. 2.) When I drive a left turn at a speed of 90-100 km, the front right of the front is clapping. 3.) My air conditioning unit constantly loses coolant at intervals of a few months. rin (recommended and filled by Volvo) does not cause a problem. Then it is filled up again expensively, so it smells very strange afterwards, when you turn on the air conditioning. At some point the smell (and the coolant) disappears and then the air conditioning gives up the mind. The resident Volvo dealer only shrugs with the shoulders and I have to constantly go to the hairdresser because I stand with anger the hair on the mountain! Who can help me ???