Swirl motor resistor mod - MBWorld.org Forums

Jul 12, 2018 | 10:03 PM

dieselolds

Thread Starter

Junior Member

Joined: Feb 2017

Posts: 20

Likes: 2

From: Newfoundland,Canada

2008 E320 bluetec

Swirl motor resistor mod

Hi to everyone.I’ve only posted a few times since I joined here a couple years ago but this past week my 08 E320 Bluetec showed a P2015 and after doing a search here i was pretty amazed that a 25 cent 4.7K ohm resistor could fix that problem so I went ahead and did the mod a few days ago.It turned out perfectly.I also removed the top plastic engine cover so the engine could cool a little better.I just wanted to say thank you to everyone here for their helpful responses.I do appreciate it.

Jul 12, 2018 | 11:43 PM

Micah / AF1 Rac

Senior Member

Joined: Jan 2011

Posts: 422

Likes: 52

From: McDade, Texas

W211 e320 CDI

Make sure you have a high enough wattage resitistor as too low may checksum fine but burn up quickly with load applied to it. Lesson learned on V12 BMW 750il e38

Jul 15, 2018 | 08:01 PM

dieselolds

Thread Starter

Junior Member

Joined: Feb 2017

Posts: 20

Likes: 2

From: Newfoundland,Canada

2008 E320 bluetec

Quote:

Originally Posted by Micah / AF1 Rac

Make sure you have a high enough wattage resitistor as too low may checksum fine but burn up quickly with load applied to it. Lesson learned on V12 BMW 750il e38

Thanks for the heads up on that.The resistor I’m using is 1/4 watt.Is that okay to use?

Jul 15, 2018 | 08:38 PM

Micah / AF1 Rac

Senior Member

Joined: Jan 2011

Posts: 422

Likes: 52

From: McDade, Texas

W211 e320 CDI

I ended up using a pair of 5w but it’s all about the draw of the motor and Ohms law

Jul 15, 2018 | 09:16 PM

dieselolds

Thread Starter

Junior Member

Joined: Feb 2017

Posts: 20

Likes: 2

From: Newfoundland,Canada

2008 E320 bluetec

Quote:

Originally Posted by Micah / AF1 Rac

I ended up using a pair of 5w but it’s all about the draw of the motor and Ohms law

I’ll keep an eye on it anyway.Thanks for the reply on that.

Jul 16, 2018 | 11:36 AM

rapidoxidation

MBWorld Fanatic!

Joined: Jan 2016

Posts: 2,749

Likes: 881

From: In the Shadow of the Tetons

2013 ML350 Bluetec

50 milliwatts is well within the realm of a 1/4 watt rated resistor. What am I missing that you needed a pair of 5W resistors? Parallel or serial? What resistance did you use? You know ohm's law so you must also know what two resistors in parallel will do.