I bought a 2004 mercury sable i notice the back seat it dont have the seat belt snap that click but on the top of the seat is like a anchor

Many manufacturers suggest that seat belts be replaced after a certain time, and many belts do go faulty. They do cost a bit of cash, but you have to weigh up cost against your life. Replace a faulty belt, the sooner the better.

Generally yes but a bypass belts is usually only a few bucks cheaper than replacing the compressor with a used one.

Not sure what you need. If you need a new belt, take it to a parts store (O'Riley, etc) and let them look at it.

If it's that tight it would be easier to remove the lower back seat and remove the 18 mm bolt and remove the seatbelt anchor. To remove the lower back seat pull up sharply on the front left and right sides of seat, only held in with plastic clips, then seat will pull forward and ouy

...are under hood, a diagram on top of radiator support.

Click on the following free direct Link.
It has the correct Belt Diagrams for your 1999 Mercury Sable 3.0L V6.

Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/1999/make/mercury/model/sable/1999_mercury_sable_drive_belt_routing_diagram.htm

there will be a diagram when you pop your hood look under it or on the frame that runs parralel from both headlights.

Try pushing lower seat cushion IN towards the BACK and UP. Hope this helps

Q: Are you wearing your seat belt? Yes? No?

A: No.
Solution: Put on your seat belt!!!!!! Save a life!!!

A: Yes.
Soultion: There has to be a fuse either under the dash or under the hood that controlls the chime.
There is a switch in the seatbelt connecter that controlls the chime. It has either failed or the wireing that carried the signal to shut the chime off has been damaged.

there should either be a whole for a ratchet or there is a nut on the tension pulley that you will have to size a socket to. put either tool on and pull in the direction of up( you'll see what i mean when you get there). be gentle once you have the belt in place not to let it snap back into place so as to not cause any damage anywhere else.