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I have a 2010 E550 with secondary air pump issue. The pump…

Customer Question
I have a 2010...

I have a 2010 E550 with secondary air pump issue. The pump is good as I checked it to the battery. The 40AMP fuse was blown and replaced, I also checked the relay and it appears to be fine. However when I start the car I get no voltage to the pump. Do you know the layout of what pins or what for the relay?

Mechanic's Assistant: Does the battery look like it's leaking? And does it have a strong smell -- like sulfur?

No the battery is good

Mechanic's Assistant: Are you fixing your E550 yourself? What have you tried so far?

Yes I'm working on it myself. I have test voltage to the relay and then out to the pump but not sure what the pins on the relay are to be showing?

Submitted: 11 months ago.Category: Mercedes
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Answered in 8 minutes by:
9/13/2017
Mercedes Mechanic: Gunvir Singh,
 replied 11 months ago
Gunvir Singh
Category: Mercedes
Satisfied Customers: 2,013
Experience: Master Tech at Kennesaw Auto Tech
Verified

Hello, let me review your request. Please stand by.

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Mercedes Mechanic: Gunvir Singh,
 replied 11 months ago

Did you check for voltage at startup with engine cold or warmed up?

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