Is there a fault with my Audi A4's start-stop system?

I believe I have a problem with my Audi A4 Avant B8's start-stop system. Whatever I do, including switching everything including radio, lights and climate control off, I cannot achieve more than 25 seconds. What causes this? My car has been inspected by Audi and they have replaced the battery. This has made little to no difference. They are adamant that no other faults are found. Is this normal?

Asked on 16 August 2010 by archie111

Answered by Honest John
Probably due to the state of the battery due to the fairly short distances you drive. A start-stop system relies on the car doing sufficient distance to fully charge the battery, and with a regenerating alternator that is much further than a normal car.
Similar questions
I bought a 2-year-old BMW 118d last May from the local BMW dealer. It is a fantastic car, but the stop-start function didn't work from day one. I reported it and waited until now to make sure there were...
I have a 2021 Mazda6 2.0 petrol and the stop/start function is not working. This first happened on 10th January 2025. I became aware that the stop/start function was not functioning — no warning lights,...
What stop start battery would you recommend for my Skoda Octavis vRS? Prices seem hugely variable, as do warranties. How do I choose?
Related models
Solid build quality throughout. Huge range of engines and specifications. Available with Quattro four-wheel drive. Frugal diesels. Well designed and user-friendly boot.
 

Ask Honest John

Value my car

Save £75 on Warranty using code HJ75

with MotorEasy

Get a warranty quote

Save 10% on GAP Insurance

Use HJ10 to save on an ALA policy

See offer