Howdy, got codes p0170 and p0173. No vacuum leaks detected and vehicle seems to run ok (to the customer at least) any tips on where to start looking.Thanks in advance and Happy New Year

 

Clean the maf sensor with crc brand maf cleaner.diy on benzworld.org w210 section.Sensor insert can be purchased for about $127 at germanstar.net
cleaning helps about 50% of the time.
early on most don't notice the change but left to long and fuel econ will drop and potential damage long term to the cats.
ecu will adapt to the new or cleaned unit after several drive cycles.
ohlord

 

Thanks for the reply. we will do that asap. God Bless you and yours-frogfinder

 

http://germanstar.net/MAF.htm
in case cleaning does not work.
ohlord