It appears that there are many newbies on this site who may have ordered new SLKs and who might like to track their car as it is shipped over to the US or other countries.
My car came over on a ship owned by Wallenius Wilhemsen. Mercedes contracts with a couple of shippers but most of the cars are shipped by this company. Using the link listed below I was able to enter my VIN and track the car from the time it was assigned to WW for shipment. The link told me what ship it was on, when the ship left port, Bremerhaven in my case, and when the ship and my car reached Baltimore for delivery. It spent a week or so in Baltimore getting the Serius radio installed and then being transported to Illinois.
I hope this info is useful for someone. You'll have to roam around the site until you find "auto cargo" and then enter your VIN. It will give you the tracking info.
If you don't know your VIN, shame on your dealer rep. The dealers should be keeping you informed. Once your car clears production it is assigned a unique VIN and the VIN is available to anyone with access to the Mercedes order system. If I recall correctly, it is called Netstar. Only the dealers can access it. My sales rep explained the system to me and let me look at the screens as he typed in the commands. For instance, we were able to see that my car was only the 4th or 5th SLK 55 to reach the US with the 030 package.
The sales reps have to study and take exams to move up in the system and earn additional access to higher levels of the computer system. If your salesman isn't able to access the production schedule for your car, press him to have the management access it for you. You should be present if you really want to know what is happening with your car.
They can find out where your car is on the production line, etc. Don't take 'no' for an answer. You guys are paying a pretty penny for these cars and it shouldn't be too much trouble for your salesman to give you first-class service.
Here it is:
http://schedule.2wglobal.com/AppTracking/index.jsp
Enjoy!!