The Great S8

The battery on our 2013 Q7 Prestige is crapping out, and we had to get a jump today. The alternator is bumping up the voltage to about 13.6V, so I don't think that is the problem. I will pull the seat back and look at the battery soon, and assuming it is OEM does anyone know if it is sealed or can I add distilled water?
Thanks in advance.

Built4Sin

Word of advice, if your battery dies anywhere but home; you're going to have to apply power to the jump points to be able to move the seat for an emergency change. So save yourself the heartache and just change it now.

However you answer your question, you're probably OEM, which is lead acid. So you should be able to top it up.

The Great S8

Thanks for the advice - just to confirm we would need a charger providing power to the remote pos/neg terminals located in the engine bay, before disconnecting and replacing the battery under the seat?

Built4Sin

Correct, either a battery tender/ charger or a jump pack. The Touareg and Cayenne's are the same way.. Here's a quick video from a Touareg, the Q7's only have a few terrible videos and the good one is from the UK with the steering wheel on the other side (battery change would be a breeze in that case).

The Great S8

Thanks for all the help!!