Did they make a storage pocket that you are installing?
Or aare you talking about the new C230? If so, don't you already have the storage pocket?
After you have removed the 2 screws, you just have to kind of pull in different ways, it's held on by guide rails that are rather tricky. But just kind of work with it and they should come out.
If you can't get it out, there is another way, more involved, but they come out easier.
2006 E350 w/ 155k miles (Daily Driver)
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)