What depth should I replace brake pads on '99 Boxster?

My mechanic says I need new brake pads on my '99 Boxster because they are at 4mm in front. At what depth are they generally replaced at? He
seems to think I can't leave the shop today without having it done. Thanks for your help!
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Depends on your driving style. for me, I'd leave it. 4 mm is a fair amount of pad depth still. However, you need to keep in mind that, again, depending on your driving style they may need to be redone within a year. Nevertheless, for peace of mind, it doesn't seem unreasonable to change at this point. If it were my wife's boxster ( I know here driving style :-( ) and I wasn't as aware of the car because I wasn't driving it much, I'd change it.
cheers. guenter
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Brake pads are relatively cheap insurance - if you could have gone a couple of mm longer, over the life of the car you'll save what, a set or two of pads? I'd change 'em, personally.
On the other hand, if you leave 'em and they wear to the point that you go metal-to-metal, then your costs will be much more.
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