Enabling static cornering lights in the Volkswagen Golf Mark V (Mark VI is covered in it's own guide) only requires a few changes via Vagcom/VCDS.
The cornering function works when your headlights are activated (either manually or via the RLS) under the following conditions
The indicator is activated either by holding it down or clicking it into position (not when comfort indicating)
The car is in P, N, D, S or Manual (not when in reverse)
The steering wheel is turned away from the straight ahead position.
The speed is under 50kph (once the car drops below this speed the light will activate and once it goes above this speed the light will fade off)
The fog light on the side of the car that the wheel is turned towards will light up, depending on the speed of the steering wheel the light will either fade in slowly or turn on instantly but the light will always fade out slowly.
You will need a 30 Byte Central Electronics Convenience Module (CECM) which are fitted to MY08's models onwards.
Full details and instructions here - Enabling static cornering lights in the Volkswagen Golf Mark V with factory fitted fog lights
The cornering function works when your headlights are activated (either manually or via the RLS) under the following conditions
The indicator is activated either by holding it down or clicking it into position (not when comfort indicating)
The car is in P, N, D, S or Manual (not when in reverse)
The steering wheel is turned away from the straight ahead position.
The speed is under 50kph (once the car drops below this speed the light will activate and once it goes above this speed the light will fade off)
The fog light on the side of the car that the wheel is turned towards will light up, depending on the speed of the steering wheel the light will either fade in slowly or turn on instantly but the light will always fade out slowly.
You will need a 30 Byte Central Electronics Convenience Module (CECM) which are fitted to MY08's models onwards.
Full details and instructions here - Enabling static cornering lights in the Volkswagen Golf Mark V with factory fitted fog lights