There is no splash guard...I assumed it was removed(damaged). I am not aware of any smoke when I accelerate up a hill (none visible from the rear view mirror at least). Car runs great. Should I continue driving and wait to see if any more oil is being consumed or inspect plugs and get the seals replaced? Do you think it's a guide problem? An experienced MB mechanic told me via email that replacing the seals will probably fix the problem-too early in the car's life to replace the guides (valve job).