To post a question:

1) Register as a member of the Shop Forum by clicking "register (http://www.mercedesshop.com/shopforum/register.php)".
2) Activate your membership by clicking on the link in the email we will send you immediately after you register. Be sure to look in your spam folder if you can't find the email.
3) Select the forum you want to ask your question in. (Tech Help, Diesel Discussion, etc)
4) Click on the "New Thread" button. It looks like this:
http://www.mercedesshop.com/shopforum/images/buttons/newthread.gif