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How to replace air pump on W211?

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Old 05-19-2010, 11:24 AM
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e500 2004
How to replace air pump on W211?
Hi,

I've searched the forum but have not been able to find DIY instructions for replacing the air pump on my E500.

Can anyone tell me how, or maybe tell me exactly where the Air Pump is located in the engine bay?

Thanks,
Todd
2004 E500
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Old 05-19-2010, 02:58 PM
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06 E55(SOLD), 03 E500(SOLD)
Which air pump?

The pump for the suspension or the pump for the exhaust.
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Old 05-20-2010, 02:58 PM
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e500 2004
The air pump for emissions (not suspension).

I think I learned it is sitting under the black plastic near the front of the engine in the middle. Please correct me if I am wrong, as I have not checked yet.
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Old 05-20-2010, 08:00 PM
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Yeah, that's the air pump. The front engine cover clips onto it.

Remove'install air pump:

Engine trim panel

Bolt of air pump support to timing case - 12 Nm - Pay attention to ground cable

Air hose

Electric air pump - Unplug electrical connector
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Old 05-21-2010, 08:29 AM
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e500 2004
Thanks. I've read something about a bad relay burning out air pumps (I guess the pump does not shut off with a bad relay?). Hopefully I don't have that issue.

R&R of this air pump sounds pretty simple. I just changed the rear brakes last weekend on the E500, and that was very simple!

Regards
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