Hi all - I'm new to the site, and to any site, a bit of a computer dinosaur. Own a 2006 Jetta TDI with 115K and the car has been great. Last Friday got first check light and asked the dealer where I bought the vehicle new from to read the code for me but they wanted 70 bucks. I have been choked at this dealer for a long time, they would not answer any of my questions without bringing the vehicle in, simple stuff like resetting the maintenance reminder (I'm done with those A - holes). Anyway bought a OBD2 reader for 100bucks and found code P0674 ( #4 glow plug) Still looking for more info on changing the plug or troubleshooting the circuit. What service manual is the best and where to get one? FYI I'm a aviation mechanic with 30+ yrs so no worries on doing the work just need some info. Sure appreciate some guidance and I'm sure the info is in this black box computer somewhere. Later