Clicking sound, Relay switch ?

[Jeffxb]

Apologies if this has been posted elsewhere.

I've just purchased my 5th Audi, a 2013 A6 S-Line Black Edition which I love !

I've noticed, when the car is cold, a clicking sound coming from the driver side door or possibly near the headlight switch. It sounds like a relay switch and tends to last for a couple of minutes before it disappears.

Any ideas ?

Any help would be greatly appreciated.

Many thanks

Jeff

[Guest 2]

A4 does it aswell, probably something to do with the cold start procedure.

[Jeffxb]

A4 does it aswell, probably something to do with the cold start procedure.

Many thanks for the prompt response Chris, greatly appreciated.

Suspected it might just be a series of tests, was starting to freak me out though !!

Cheers

Jeff

[ukgroucho]

My allroad does it too but only in cold weather. Wondering if there is a relay for auxiliary heater or something back there.

[johnsimcox]

The clicking of relays is much more noticeable in my FL Ultra than it was in my previous car


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[Imran_ms]

I have a 2012 A6 and I thought it was passenger side mirror, any ideas how to get rid of it?

[Scott K]

I saw on another forum that someone had switched off the auxiliary heating to stop the clicking.

[belly buster]

I notice an occasional relay click, but only in cold weather and always assumed it was the aux heater relay.

[burningoil]

I get it as well in 2015 a6
i will try and post response from garage here goes
"
Clicking noise from behind dash is from the heater relays ( he took it apart to check and it is them) this is normal and not a defect.

[pumpsmynads]

Definitely the auxiliary (supplementary?) heater relay. If you set DIS to efficiency monitoring (or whatever it's called) you see the bar move when you hear the click.