Debian wlan0 interface not found

I have troubles to configure my wireless card in Debian Wheezy. I followed the instruction from: https://wiki.debian.org/iwlwifi

It is a fresh debian install, before this i ran Ubuntu but because I had some troubles with it (not wireless related problems) I decided to give Debian wheezy a try.

Note: Wireless worked out of the box running the latest Ubuntu version.

Before installed the Debian I checked my wireless card it told me it was:

8086:0083 Intel Corporation Centrino Wireless-N 1000 [Condor Peak]

Note: internal wireless card on laptop: Dell XPS L502x

this card is also in the list of supported devices, so i installed Debian, installed the iwlwifi module. that enabled the 'Wireless' tab at the network manager. But iwconfig tells me that there is no wlan0 interface found.

so i ran lspci -nn | grep Wireless on the debian terminal and it stated: (see the difference to the numbers in the beginning)

03:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 1000 [Condor Peak] [8086:0083]

output: rfkill list all (i had to install rfkill first, maybe it is a sign more is missing? )

$> rfkill list all
0: dell-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no 

when i ran iwconfig, ifconfig or ip addr these interfaces are shown:

eth0 (currently working on)
lo (loopback)

ouput: ifconfig -a

eth0      Link encap:Ethernet  HWaddr 84:8f:69:ae:44:5a  
          inet addr:192.168.178.29  Bcast:192.168.178.255  Mask:255.255.255.0
          inet6 addr: fe80::868f:69ff:feae:445a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2465 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2093 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1922631 (1.8 MiB)  TX bytes:255361 (249.3 KiB)
          Interrupt:41 Base address:0x6000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:480 (480.0 B)  TX bytes:480 (480.0 B)

output of: dmesg | grep Wireless

[    6.686069] Intel(R) Wireless WiFi Link AGN driver for Linux, in-tree:
[    6.686694] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) 
Wireless-N 1000 BGN, REV=0x6C

Do i have to manually 'start' the wireless card before it is able to scan the networks? Do you have any suggestions for me to make it work?