Took the 850 for a test drive to check all the things that are bad and emediatly noticed that the stearing wheel has a lot of free space, so I will need to inspect that, but what caught my eye really hard was while on a drive I got a small downhill and noticed that the brakes were almoust dead so I went straight to the garage and put the car on jackstands and removed the wheels.
It was shocking to see that the car got coilovers and brembo 300mm brake discs whit brembo 4 pot calipers on all corners but a bigger shock was when i checked the brake pads they were worn out totaly.
While I was replacing the pads I also decided to replace the brake fuild too and now the braking sistem is fine. On a Volvo forum I found out that ATE Super Blue Type 200 DOT4 is a recomanded fluid for the 850s and that the quality of it is really good so I expected a high price but when I saw that a can of 1l costed only V$18.25 I decided to buy 2 cans for just in case, also the pads were cheap too V$40 each so V$160 for all 4.
Also I will need to drain the old oil from the engine and take the engine apart to inspect it since the engine feels really bad, some gremlins are inside it xD
Spoiler:
ATE Super Blue Type 200 DOT4 2x1l -V$35.50
Brembo brake pads x4 -V$160
TOTAL -V$196.50
Weekly income +V$750
Remaining : V$2333.50