2004 S430 purchase
As tusbaes mentioned, the 4matic is a feature for better traction control. If you live in an area that is prone to lots of rain or snow it is a great option to have. It can keep the car on the road better when you are in slippery conditions. If this is to be your DD and you life in an area of heavy rain or snow this would be a great car for you.
Aside from addding another dimension of maintenance and repairs to the vehicle it should not be something that is concerning. I don't remember hearing about any inherent problems with the 4matic but like any system on the vehicle there is the opportunity for it to fail and cost you $$. Just something to keep in mind as you make a decision on whether or not to buy.
This appears to be a great find for you to use as a daily driver. If the price is right you should jump on it.
Keith








You just have to get a 6" lift first and then you can go for it.

