E-Class (W211) 2003-2009

rain water drain tube located under aux battery in 2003 E500

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Old Aug 2, 2013 | 12:34 PM
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2003 E500
rain water drain tube located under aux battery in 2003 E500

Doe anyone know where the drain is located for the compartment that holds the auxiliary battery. When I removed the aux battery to replace it, I found water puddled under it.
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Old Aug 2, 2013 | 02:08 PM
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How the heck did water work its way into that compartment?
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Old Aug 5, 2013 | 07:23 AM
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2003 E500
There is a vent in the hood and there is nothing on the underside of the vent to divert rain away from the engine compartment.
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Old Jan 8, 2014 | 10:54 PM
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The drain empties into the passenger fender well.

I just cleaned mine today. It was packed with dirt!!

Jack passenger side up
Take passenger front wheel off
Remove the inner front fender liner. You only have to remove the rear part of the liner.
The drain is black and shaped like a triangle. 2 10mm bolts and out it comes.

Wash out the inside of the drain vent. Can also pour some water very carefully down past the windshield wiper tank from the hood to help flush any dirt or debris out. Careful not to splash any water on the battery.
Attached Thumbnails rain water drain tube located under aux battery in 2003 E500-image-3710554381.jpg   rain water drain tube located under aux battery in 2003 E500-image-1039176948.jpg  
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Old Jan 8, 2014 | 10:56 PM
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That's my black gloved hand holding the drain in the first pic. It was 40 degrees when I took this photo
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Old Jan 9, 2014 | 03:35 PM
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2004 E320
Wouldn't it have been easier to clean it out from inside the engine compartment ?
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Old Jan 9, 2014 | 03:46 PM
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Originally Posted by starbrite
Wouldn't it have been easier to clean it out from inside the engine compartment ?
You could. Not quite sure what you have to remove other than the cabin air filter box

I had my liner taken out to fix my leaking windshield wiper tank and noticed it then.
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Old Jan 9, 2014 | 04:26 PM
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2004 E320
Ahh, Ok that makes more sense.
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