Common sl500 battery drainage

[Danoli123]

Hi .
Can anyone point me to the main area's to check for battery drainage to check on a 2002 sl500 please. Many thanks.
Nigel

 

[Blobcat]

Comand system not shutting down
Water damage in the boot

 

[Craiglxviii]

Comand system not shutting down
Water damage in the boot

Did someone say “leak”?

 

[SL63 Mark]

Could be anything, you need to go through the fuses with a current tester when the car is "asleep", otherwise we are guessing,

 

[Craiglxviii]

Hi .
Can anyone point me to the main area's to check for battery drainage to check on a 2002 sl500 please. Many thanks.
Nigel

By the way. There are about 130 culprits! You’ll need to test every fuse.
PSE pump. COMAND not going to sleep. Alternator diode pack. Loads of potential causes.

 

[Blobcat]

Did someone say “leak”?

Low hanging fruit…

 

[LostKiwi]

Comand, cd changer, TV tuner, mobile phone kit....

On mine it was Comand related. If I turned off the car and sat for 5 minutes you could periodically hear the CD Changer cycle. Disconnected the CD Changer and TV tuner (both in same area) and battery no longer goes flat overnight. Not bothered figuring out which it is but it's one of them.

 

[SL63 Mark]

For me it was a slight drain on one of the rear window motors. Depends how big is the drain, 0.30 amps is normal. Anything over 0.50 is a problem, most people fit a trickle charger and problem solved.

I have a 0.35A drain and the consumers message will come on after a couple of weeks. You can connect a meter in series with the rear battery and watch the car go to sleep.

 

[00slk]

Did someone say “leak”?

Low hanging fruit…

Oye, I am here you know........

 

[Cole@MBS]

Check under passenger side carpet, make sure the small brown and green can block conectors aren’t green due to water Ingres!

 

[Tony Dyson]

For me it was a slight drain on one of the rear window motors. Depends how big is the drain, 0.30 amps is normal. Anything over 0.50 is a problem, most people fit a trickle charger and problem solved.

I have a 0.35A drain and the consumers message will come on after a couple of weeks. You can connect a meter in series with the rear battery and watch the car go to sleep.

I fear you've missed out a zero Mark, shouldn't that read 0.03A (30mA) and 0.05A (50mA) for a sleeping state? 0.5A (500mA) is a big number?

 

[Craiglxviii]

I fear you've missed out a zero Mark, shouldn't that read 0.03A (30mA) and 0.05A (50mA) for a sleeping state? 0.5A (500mA) is a big number?

I had a 0.4A (420mA) drain that was killing my battery in under 8 hours.

 

[Danoli123]

Did someone say “leak”?

In uk we say that

 

[Danoli123]

By the way. There are about 130 culprits! You’ll need to test every fuse.
PSE pump. COMAND not going to sleep. Alternator diode pack. Loads of potential causes.

Ok many thanks ..good man

 

[Danoli123]

Comand, cd changer, TV tuner, mobile phone kit....

On mine it was Comand related. If I turned off the car and sat for 5 minutes you could periodically hear the CD Changer cycle. Disconnected the CD Changer and TV tuner (both in same area) and battery no longer goes flat overnight. Not bothered figuring out which it is but it's one of them.

Thankyou. Top man

 

[SL63 Mark]

I fear you've missed out a zero Mark, shouldn't that read 0.03A (30mA) and 0.05A (50mA) for a sleeping state? 0.5A (500mA) is a big number?

Thanks Tony LOL, couldn't remember exactly how to write milliamps !

Mark

 

[Craiglxviii]

In uk we say that

It’s a recurring joke, anyone with a 230 SL understands leak paths…

 

[star]

Alarm siren?

 

[Taffy7hfa]

Alarm siren?

Just fixed that problem on the 350