I have a question concerning the size of the Air Intake Duct that sits behind the Grill of the 4 Cylinder R170 SLKs. I noticed when doing my Grill that the Air Intake Duct that sits behind the Grill that feeds the Airbox is, in my mind, absolutely tiny compared to the Tubing behind that leads to the Airbox and the rest of the Intake Piping. Unfortunately I did not take a photo myself but have found a Generic one that will serve for the purpose of illustration. It measures approx 4cm across by 6cm high whereas the rest of the piping is approx 8-9cm in diameter! Surely this cannot be right? I liken it to breathing in through your nose with one side blocked - not good! Every other Mercedes and other cars where there is an Air Intake behind the Grill might not be exactly round but is more or less a similar overall area as the rest of the Tubing it feeds. Please enlighten me someone as to why this is? To be honest I was contemplating removing this and just extending the Pipe it connects, (which is easily twice its size) out to the same point.