I am brand new here as well as to the Audi world, so hoping to get some good feedback. Just got a 2004 Allroad in pretty good shape. My main issue is that the check engine light will not come on when OBD is performed (or when key is turned to on position). There is an error code for suspension but I do not remember it!! From what I know, the previous owner had removed the air suspension and replaced with traditional shocks/springs. This had caused the CEL to come on and stay on. They somehow by-passed it and not the CEL won't come on at all? Afraid it will fail emissions here in MD (they do OBD for emissions). Any suggestions on how I can get the CEL to function properly? Thanks in advance to all that advise.....