C63 W205 starter battery location

[Freakuk]

Had a mail from Mercedes warning me my starter battery is critically low. I haven't driven the car in a few weeks so to be expected.

I did go for a quick drive earlier around 10 miles or so between calls, but I'm wondering if it might be easier just to throw a charger on, but the message suggests there's a specific battery just to crank the motor, could anyone confirm and where it is also?

[JAMSXR]

Here you go.

https://blog.fcpeuro.com/how-to-replace-a-mercedes...

[DannyB2007]

Yeah get a ctek mate I've just been out and plugged mine in as it's been sat 6 weeks now and my app told me to sort it out! Will keep it plugged in now instead of leaving it that long again!

You'll know when the aux battery is fully charged as the A (stop start) light in the dash will be green. I believe plugging in via the flap in the engine bay charges them both.