Id be more annoyed with the $220 wasted mucking about looking for carbon they werent going to cover.

You can see in her message that she has been "trained" to blame "external issues" and "bad gas"...this is the littany that BMW has propogated due to their design defects that cause fouling of the secondary air passages in many models of their car.

If you've read the 335d threads BMW **DOES** cover the cleaning when owners are sharp and pin them down.

Pay her the $$$. It is FAR better than a POS K&N.

I wouldnt let them do any work until they start gving clear cogent answers. A "Stop All Work" letter, FAXED to the dealer with a copy in the mail, CC to the general manager will get serious attention. If it gets to that... time for a 'come to Jesus' conversation. She may ne Ditzy..or she may be purposefully being vague. Or I suppose the deadly combo of 'both'..