Driving to Oberstdorf

Hello,
Would anyone be kind enough to tell me how long it takes to drive from Calais to Oberstdorf? I have found in the past that route planner estimations are often way out! I would like to hear from someone who has actually done it. It will be either a night drive, or very early morning start, on saturday half term this February - joy..........
Many thanks
Skimac )

May not be the best of help but I have drove from Ulm.
Follow the signs for Memmigen, then Fussen, then Oberstdorf. Around 1hour30/40 to do that leg. Very good road.

Hi ~We have driven to Oberstdorf several times but usually do the route from Rotterdam as that ferry service is most convenient for us. However the mileage is very sinilar and takes approximately 9 hours in good traffic conditions with plenty of comfort breaks along the way. The road net works are excellent and good time can be made. We much prefer the drive to flying as it means you can take all the ski gear you like. Have a good trip.
Lindsay