I see Air Pump Off plates in the TVT_design shop.
But don't understand how and why...
What this Air Pump do bad and why You can remove it.

 

Unlike other manufacturers who use AIR injection pumps driven by belt off the front of the motor, Mercedes chose to use a AIR injection pump driven by an electric motor. This is what makes the clicking whirring noise when you cold start the Crossfire. Ir pumps extra 02 into the exhaust manifold to get the catalyst fired up while the engine is still cold. Once the exhaust temp reaches a certain level it kicks off. It reduces cold start exhaust emissions and serves no other function. As to why you might want to remove it...well, it's noisy, kinda ugly, sorta right in the way up top front center on the engine and really only runs for about thirty seconds before kicking off.

Slim

 

Thank You, Cincinnati Slim! But what about "check engine" lamp after air pump remove? It'll not be light on?

 

This has little to no effect on engine performance from what we can tell. And Clim is correct in his explanation.

We have received no lights or codes, but had one SLK32 report a NO Secondary AIR code (not sure on number). It didn't effect the car, just came up on a scan.

This is more of a an astethic mod and for a car that is daily driven or under warranty, I really would not suggest it.

 

Hi guys.. the postings about the air pump motor are about 3 years old now. I'm curious as to whether anything has changed regarding removing the pump... today when I parked my car the motor was still running- I didn't know what it was and it worried me a bunch so drove it right to the local dealership (still under warranty). They were very busy but unplugged the electrical connection and will 'get to it as soon as they can.'

So guys, should I just leave the thing unplugged?

Any help greatly appreciated!~

 

If you have emissions testing in your area, then you should fix it.
If you don't, and you don't get a check engine light, then you can let it go for as long as you want to.

IIRC, its probably caused by a faulty solder point in the RCM.

BC.

 

Thanks so much for your help, BC!