Audi A4 B9 A5 F5 Q7 4M Hill Hold Auto Hold Switch Brake Button 4M1 927 143 B

A4 B9 Auto hold: https://www.drive2.ru/l/605205010984211269/ 

green/black --- J519 bcm -- B plug NO.31

green/yellow --- J519 bcm -- A plug NO.17

brown---- GND

grey - Backlight --- 

https://munteanubogdan.com/english/retrofit-auto-hold-audi-a4-b9-english/

• Complete set for retrofitting the Auto Hold / Hill Hold / Hill Start Assist
• suitable for the following vehicles:
• A4 8W
• A5 F5
• highest starting comfort for your vehicle
• With the Auto Hold function you extend the electronic parking brake
• At standstill or when starting off, unintentional rolling away is prevented without you having to apply the brake, as Auto Hold saves the last brake pressure if you have previously braked to a standstill
• when Auto Hold is activated, the Green P icon lights up in the speedometer
• The Hill Start Assist prevents and deliberately rolls back or stalling the engine when starting on an incline

We support 7-day return policy. You may submit return request within 7 days upon receipt of your order.
All returned items must be unused, kept in original condition with all tags attached and original packaging intact. A receipt or valid proof of purchase is also required.
Please note that return shipping fees to Hong Kong shall be borne by the buyer.

Orders ship from China and are processed in 1–3 business days.

• Express (DHL/UPS/FEDEX): 2–7 DAYS
• Standard (FREE SHIPPING): 7–15 DAYS
• By default, we will declare 10 USD.