I have an SD card stuck inside the CD slot

Depending on how stuck it is, you may need to disassemble your computer to get to the optical drive and then disassemble the drive itself. Dell systems (generally) don’t have warranty seals or tape on the drives, so you can do this without them knowing on a lot of them. If you break it it’s on you, regardless of if the drive has tape or not so don’t use this to commit warranty fraud if you break the drive. It’ll also require special care because of your situation as well, so don’t yank the drive out like you’re doing a normal repair.

We don’t know which system you have, so we can’t direct you to a repair guide. That said, many of the Precision laptops are easy to do this on and the drive can (generally) be removed by removing 1 screw after removing a service panel. It sounds like you have a slot loader Precision, so you probably shouldn’t take the drive apart beyond removing the cover or you will probably break it.