1998 ML 320 P0410 Secondary Air Injection?
 

On a 98 ML 320 I am having problems with a code P0410. My question is the 40amp fuse that says it is for the Secondary Air Pump doesn't have any juice on it. I flip flopped a couple of the relays for the Secondary Air Injection and that did nothing. My question is that I have no fire getting to the secondary air injection pump. Should I not have fire at the 40amp fuse and at the pump itself? If so is there anything typical that goes bad that would make this happen. Thanks

In most cases the relay powers up the fuse.

Does the pump ever run when the engine is COLD?

The pump never runs at all. I never seem to have juice coming to the pump.......

1998 ML P0410 code
 

BigRed,
Did you ever find a solution to this problem? I have the same thing going on in my 1998 ML320.
Thanks,
Ken

open the fuse box , test relay k 28, that powers air pump from M.E. control unit