1998 E 320 wagon
I have a 1998 E320 Wagon. A few weeks ago I started having starting problems. The car will always start but sometimes it requires up to 10 seconds of cranking. I now have CEL's PO173.PO304,PO305,PO306 and a rough idle. So far I haven't found any vacuum leaks and have cleaned the MAF with CRC Maf spray. I'm not sure what to look for. The plugs were changed 4,000 miles +, air cleaner is good. Is the the MAF, cat converters, Sensors or? Any suggestions would be appreciated.