Do not update your clip with this firmware if you wish to use it with your car hi fi system.
Sansa have sneakily enforced the dumb regulation from Brussells to reduce the volume.
When driving, it is almost impossible to hear music over the road noise.
I would never have updated my clip if Sansa had advised that this was going to happen.
Funny, the shaded (sticky) thread directly below this one you posted in has the answer to your problem. In fact, it is titled
Don’t know how much plainer, simpler or easier to find the Admin could have made it. Maybe if he used flashing N E O N lights in the Subject title?