Do you know how do you get the battery out of a Volvo s40 to change it?
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Like a cop car. Got corsa exhaust Mrs. Officer?

 

There is a battery tie down on the front side close to the motor.
You lift up the tie down then work the battery out.

Do you have the foam cover over the battery or the felt one?

If you have the felt one first disconnect the battery cables and slide the felt part out then you should see the tie down then you can remove it.