E55 AMG flat battery

[Physio]

Hi guys
I recently bought an E55 but the battery is now flat after standing a few days. How do I recharge the battery and how do I get into the boot to do it. Any advice
Thanks

 

[mbzclk]

You need to use the key blade from the key to enter the boot or the drivers door unlock.

Use a CTEK or maybe it’s an old battery that will need replacement. Needs AGM 019.

 

[szucchet]

Indeed might need a new battery, shouldn't go flat if only parked for a few days!

 

[Physio]

I may have mislead you. It’s been parked a couple of weeks. Do you know where I should charge the battery from. Under the bonnet or in the boot. If it’s the boot how do I get in to it as it won’t open.
Any advice would be helpful

 

[BlackC55]

Use the blade key in the boot lock to open it. Charge the battery in the boot directly with a decent charger.

 

[Physio]

I may have mislead you. It’s been parked a couple of weeks. Do you know where I should charge the battery from. Under the bonnet or in the boot. If it’s the boot how do I get in to it as it won’t open.
Any advice would be helpful

Thank you for your help guys. Ok I’ll try the key. I might seem a bit dim, but the car is in West Sussex where my daughter is staying and I’m in Cumbria so I’m doing this at a distance.
will It cause any problem trickle charging from front battery or rear battery?

 

[BlackC55]

Must be the rear battery. There is some guidance in the manual if that's any help?

 

[whitenemesis]

I’m in Cumbria so I’m doing this at a distance.
will It cause any problem trickle charging from front battery or rear battery?

You'll need one hell of an extension lead!!

 

[Physio]

Ha ha yes

 

[Physio]

Ok going to get her to try it.

 

[Physio]

Thanks guys. Hope it hasn’t caused any irregularities with the electronics?

 

[whitenemesis]

I had a CTEK charger more or less permanently attached to the rear battery of my CLS55, never a problem with the car's electronics

 

[Physio]

Thank you whitenemesis.
Which charger did you bye. Think I’m going for Ctek as suggested by Mbzclk

 

[Physio]

Buy

 

[Physio]

Oh I see a ctek which model

 

[whitenemesis]

CTEK MXS 5.0

I had the connector eyelets fitted so only had to plug in the charger each time, no messing with battery access

 

[Physio]

Oh I see where do the other ends of the eyelets reach to?

 

[Physio]

Are they in the boot or at a point some where underneath the boot?

 

[whitenemesis]

The socket for the charger plug is in the boot, the wires come up though the boot floor trim. I kept the charger in the boot and the mains cable exited through the boot lid seal

 

[Major774]

As I know I have a relay that is causing a small battery drain. I too run a comfort connector for charging.