Trickle charge/top up battery

[Duo]

Hi,

I have a 2020 polo gti, I have done 50 000km on it.
Wanted to do some maintenance for the battery, anyone has any idea or suggestions?
Also I don’t know where to find the minus under the bonet.
Because I have read, that charging the battery from the trunk it’s not recommended..

Thanks!

[MikeDO]

I asked a similar question a while back. Think you will find your answer here

viewtopic.php?t=77747

[Duo]

I asked a similar question a while back. Think you will find your answer here

viewtopic.php?t=77747

Thanks! Can you tell me where did you exactly plug the negative ? I can’t find anything, that’s standing out..