Gurgling noise from underneath vehicle (GL320)

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jroy

New Member
Joined
Jul 23, 2021
Messages
4
Location
Australia
Car
2008 GL320
Hello all,
I have a 2008 GL320, I've noticed a gurgling noise from underneath the vehicle prior to starting, and is much more delayed when the car goes flat. Any clues what this could be? I don't believe it is a problem but I am curious.

Another question, and this is an issue with the car, it keeps going flat! Overnight, I keep it locked, but if I use the COMAND unit for it's half hour timer the car goes flat, this never used to happen, does anyone have any clues or solutions for this? I suspect the little accessory battery?

The accessory battery has never been replaced on this car, I've had numerous big batteries replaced, this one is from 2017. Could anyone let me know what that small accessory battery does? Thanks, I'm sure I'll be back in here, this car loves to break bits and pieces!

Cheers!
 

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