Battery drain/block warmer

[v8stix]

Hi all, I have been having to disconnect the battery on my 04 270d as it goes flat overnight, I was reading on here to try and find if there is any one that would know whats going on, I found a thread where the block warmer was thought to be at fault as they can break down and cause a drain on the battery.
Can anyone please point me in the direction of this thread as I would like to show the mechanic so he has a starting point at least.
thank you
John

 

[kid-jensen]

Pull the fuse to the block warmer and see if things improve....

Should be labelled as such on the diagram in the Handbook.

 

[v8stix]

Pull the fuse to the block warmer and see if things improve....

Should be labelled as such on the diagram in the Handbook.

Pull the fuse to the block warmer and see if things improve....

Should be labelled as such on the diagram in the Handbook.

Thanks for that paul but in the thread there was quite a lot of info about this problem and also a pic was added showing where it is located.

 

[davidsl500]

These might be of help

http://forums.mercedesclub.org.uk/index.php?threads/pre-heater-short-draining-battery.136713/

http://forums.mercedesclub.org.uk/i...in-over-10a-intermittent.159659/#post-1495447

http://forums.mercedesclub.org.uk/index.php?threads/battery-warning-light.171560/#post-1661510

http://forums.mercedesclub.org.uk/i...by-something-won-t-start.136925/#post-1217493

 

[mersum1es]

W211 has electric heater in air duct. Threads above refers mostly to W203 models...