Originally Posted by Jack G

Don't panic. It is highly unlikely the engine would need to be removed to do a high percentage of the most common repairs. Your leak appears to be minimal and could be coming from the valve cover gasket. This is a common problem but I would wait a while and keep monitoring it. Most oil leaks are related to leaky seals or gaskets. Remember, even though your car only has 25k miles it is 16 years old. Some gasket materials degrade when immersed in oil over time. Once you find where the leak is coming from I would recommend you have a local MB repair shop verify the leak and have them fix it if you are not mechanically inclined. Do not go to a Chrysler dealer as most on this forum will tell you. They know nothing about our German cars.
Cheers