How to enter a VW RCD 310 radio code

The CD radio with six unmarked keys under the display, in the Golf, Polo, Jetta, Caddy and Touran from about 2009 to 2014.Illustration.
Type it and every step uses your own digits. It stays on this page.
Switch the ignition on, then the radio. SAFE shows for about ten seconds, then 1000. You do not press anything to get there. The display marks the four keys under it that set the digits.
Every step
Checked against VW's workshop manuals for the Golf, Polo and Tiguan.
If it locks
You get two tries. After the second wrong code the radio is locked for one hour. Leave the ignition and the radio switched on for the hour, then you get two more. What each lockout screen means
An RCD 210?
It works the same way. The display puts an X above each key that sets a digit, and you confirm with the key at OK. If SAFE stays on the display after two wrong codes, the one hour wait is running.
An RCD 215 in the VW up?
We have no maker's steps for the RCD 215, so these are not checked for it. Go by the buttons on yours
American radio showing CODE as well?
On radios sold in the United States the display shows SAFE, then CODE with 1000.
The radio never asked for a code before?
These radios remember their own car, so a battery change should not bring up SAFE. If yours asks, the radio or the instrument cluster has usually been changed. The code goes in the same way.
Not this one? Other Volkswagen radios
VW RCD 300 and RCD 500Golf Mk5, Jetta, Passat, Touran
VW touchscreen: RCD 510, RNS 510, RNS 315Golf, Passat, Tiguan, Scirocco
VW Beta and GammaGolf Mk4, Bora, Polo, Lupo
VW RCD 200Polo, Golf Mk4
VW Premium radio, USA and CanadaJetta, Golf, Passat in North America
VW navigation: MFD and MFD2Navigation that shows SAFE and 0000