Good idea or not? R171 SLK 200

John77

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E200 Estate 2011, 2009 SLK 200
I have mentioned this before, but decided to make a modification. I do not understand the reasoning of the rain drain above the battery having a gap of a couple of inches above the drain hole, so that the water runs into the battery tray and some of it then does not drain away and sits around the battery.
So what I have done is get a plastick funnel. Shape one side flat with a heat gun and the put it into the drain hole so that the water from the drain tray runs into it and out of the hole. see photos. I have not tried it out yet, but I may make a hole in the funnel tube level with the battery tray so that any water that does collect there will still be able to get out through the drain hole, but I will look at that later.
Is there something that I am missing on the way that the drain has been done like this or is this modification a good idea?

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vtaylor78

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E350 CDI Coupe C207 2010 \ SLK 250 R172 2011.
Looks a good little mod to me, time will tell with it.
If I was being picky, I would have painted it black .
 
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John77

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Looks a good little mod to me, time will tell with it.
If I was being picky, I would have painted it black .

Yes a nice satin black would be good. The bodywork is red though, but black goes with everything.
 

Wighty

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Yes a nice satin black would be good. The bodywork is red though, but black goes with everything.
Might be worth checking after rain in case rain gets in the battery tray from another direction and then won’t drain because the red funnel blocks the only drain hole ?
 
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John77

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Might be worth checking after rain in case rain gets in the battery tray from another direction and then won’t drain because the red funnel blocks the only drain hole ?

Hi no stays dry and the funnel does not block the drain, just sits within it, as it is a smaller diameter than the drain.
 

sonic

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Possibly set up like that to dilute any loss of acid from the battery?
 

Wighty

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Hi no stays dry and the funnel does not block the drain, just sits within it, as it is a smaller diameter than the drain.
Clever buddy :)
 
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John77

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Works perfectly, no matter how heavy the rain.
 


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