Great post on your '06 E320 CDI. I too keep a detailed service history. I bought a certified '06 E320 CDI from the MD dealer and has it traucked right o my house. I have kept all the service records and diesel gas receipt to track MPG. I live in Indiana and have noticed some hesitation on cold (-4 degrees F) morning starts. Have you had similar issues? it alsomst feels like the transmisson does not want to kick in, but then when the engine warms up all is good. I noticed you have replaced glow plugs a few times, could that be the issue? Thanks.