Our '04 has no oil dipstick, and the original post is correct about the newer models don't have one. Yes, the computer is supposed to monitor the quantity of oil in it and the dealers have a dipstick too which you can order for these cars. There is a dipstick tube they use for checking the level and for sucking out the oil. Personally I still prefer gravity draining out the bottom, not simply because I think it is just a little more thorough than vacuuming it but also because it gives you a chance to look underneath the car and check things down there you'd miss if only working from above.

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz