Loud beeping on cold start

[Sanman]

On the cold mornings recently, as I turned on and cranked my diesel Tig, it loudly beeped 2 or three long tones. Not subtle modulated tones. From the instrument cluster I think. The car cranked a little slowly, I'm thinking it maybe a low battery voltage warning, but I could see no lights or messages on the instrument cluster. And on the second or third cold morning I was looking closely. Anyone know what it is?

[MGV]

I've had a single loud 'bing' on a few occasions when I've started up & it's been less than 4 degrees C, I think it's a warning that it may be frosty or icey out. Not sure if this is the same as your noise? Same as a low fuel warning sound.

[a239947]

The three loud bings are probably dropping below zero. Most euro cars do it.

[Sanman]

Thanks, this is not 'bings' or the other modulated tones normally produced. Loud beeps about 2 sec long each. Like a truck reversing. I thought it was my cheap Chinese dash-cam, but I unplugged it. Sound echoes, so its hard to trace the source except from the instrument cluster area. 5 degrees out, car was slow cranking, I thought maybe it was low battery warning or perhaps diesel-too-cold-to-fire.

[Tiggy1]

Could be worth getting battery checked - I have petrol Tig and remember similar thing and veerrryy slow cranking when mine died....

[Sanman]

Looks to be battery. Tested out as 2/3 capacity, 12.6v charged - "bad",
The beeping is some random system going nuts based on very low voltage during cranking.
RACV sells batteries for $230 for 600CCA. Apparently there is a registration process for the new battery, as VWs adjusts down charge rate based upon condition.

[ads18x]

My wife's '13 beetle does the 3 long beeps when acc/ign is on with drivers door open. Keyless start.

[Sanman]

For the record, a good replacement battery for the Tiguan:
Century DIN65LH, 720CCA 24months wty $186 at Bursons, $159 if you have a cash account, ask for a discount
Its larger than the original, but fits in the tray (which is sized for a larger battery)
Apparently there's some reset that should be done when the battery is replaced, perhaps the charge rate is set to the CCA

[Tiggy1]

Probably same as what I ended up with - was under warranty and dealer had no stock of genuine one so Roadside Assist contractor tracked down and installed Century one. Only other drama is that my airbag module died at the same time, so had to take it in to dealer once mobile to get it replaced (also covered under warranty luckily)....