E63_u_mirin

2010 with 37k miles and having battery issues.

Is it time to replace? (it is the originally manufacturers battery)

Should I take it in to get a full charge and see how long it will last?

Or should I buy a charger for home use?

Also, Is there a "secret menu" for checking the battery voltage, how do I access that?


thanks

Celicasaur

To be fair...that's 7 years....

I'm fairly sure mine will start to give up soon as well tbh.

xheamgbenz

Replace the battery it's recommend every 5 year replacement

E63_u_mirin

Bought a charger, lets see if it will hold a charge. if not, then a new one it is

xheamgbenz

Also if u buying a new one just the the auxiliary battery too

otakki

Buy a good battery charger and conditioner, ie ctek, and hook it up whenever the car is not driven. The battery will likely last forever if you do that. If not, batteries on electric-hog cars like this don't last long.

Celicasaur

...the W212 has an auxiliary battery also?? I thought that was just the E55 models....?

HPMan

I'd say 7 years for a battery is pretty long...