What should I do before returning my rMBP?

[zipur]

I got the entry level rMBP, not enough hard drive space.
How do you default a rMBP before returning it?
A quick search shows I need the OS cd to re-image the pc.

 

[spblat]

Boot with the option key and go into recovery mode. From there you can get to Disk Utility which can erase your data for you.

Don't bother unless you're very concerned about your personal data. Apple will erase it before it's in another customer's hands.

 

[GGJstudios]

I got the entry level rMBP, not enough hard drive space.
How do you default a rMBP before returning it?
A quick search shows I need the OS cd to re-image the pc.

rMBPs shipped with either Lion or Mountain Lion, neither of which were ever available for sale on a DVD.

OS X: About OS X Recovery
Apple - OS X Recovery restores your Mac with a few clicks.
Hands on with Mountain Lion's OS X Recovery and Internet Recovery | Macworld