This Genuine OEM Audi Retrofit for the A4/S4/RS4 B9 is for Hill Hold Assist.
 
Hill Hold Assist provides added convienence when coming to a standstill or on a gradient. Instead of having to put the car in "Park" or manually put the handbrake on by lifting the parking brake button, as you come to a standstill the car will automatically apply the parking brake which is indicated by a green "P" on the Dashboard/Virtual Cockpit. To disengage you simply drive away.
 
Extremely convienent and helpful, especially in urban driving conditions with a lot of starting and stopping.
 
This retrofit takes approximately 2.5 hours to complete and completed at our work in Sussex, UK.
 
This retrofit costs £350 inc VAT supplied and fitted with Genuine OEM Audi parts with 2-Year warranty.
 
Contact us to discuss.