How to install an auxiliary fuel line in your Sprinter | DIY campervan diesel heater install
Hannah and Myron Hannah and Myron
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 Published On Nov 9, 2018

Here's how to connect your diesel heater to your Sprinter van's fuel tank by installing an auxiliary fuel line. Some Mercedes Sprinters from 2007 onwards have an auxiliary fuel tap which make installing your heater much simpler. But it is an additional feature that some buyers chose not to go with. If you're unlucky like us (our 2011 didn't have one) you'll need to DIY your own. This video shows your how to drop your fuel tank and install your own auxiliary fuel line.

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Before you get started, we'd recommend getting your diesel tank as empty as possible. We ran ours until the fuel light was on.

This is doable by yourself but is much easier if you have two people working on it.

TOOLS/SUPPLIES WE USED
- Torx socket set
- Torx allen keys
- Hammer
- Drill
- Drill bits
- Craft knife
- Fuel line (some will come with your heater but you may need more or different sizes)
- Clamps
- Screwdriver
- Jack (or boxes like we used)
- Tape measure
- WD40
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SKIP TO A SECTION
00:00 - Intro
00:10 - Set up a ramp
00:25 - Locate the fuel tank
00:44 - Detach the fill hose
01:29 - Time to get under the van
02:12 - Undo the electrical and fuel lines
02:24 - Detach the tank from the van
03:25 - Lower the tank
04:30 - Pull the tank out from under the van
04:45 - Remove the cap
05:36 - Identify the point you'll install your auxiliary fuel line
06:20 - Take measurements for fuel line
07:45 - Cut new fuel line
08:13 - Drill out blocked off elbow
09:00 - Secure new fuel line into tank
09:17 - Put pump back into tank
10:15 - Connect fuel line to elbow
11:07 - Reconnect the existing lines
11:48 - Reinstall the tank
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VAN BUILD
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Plumbing
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AA Euro Travel Kit - https://amzn.to/2treYaK
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Blackout curtains (1 Panel- W 52" x L 63" in Grey) - https://amzn.to/2QIYaUA
Paper towel holder - https://amzn.to/2Qnw2qZ
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ABOUT US
We live full time in our self-built campervan. Over the past couple of years we’ve travelled all over Europe – visiting more than 30 countries in our van.
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