 Can you say water, wine or wind if so no problem? But if your result is water, wine or wind then we've got to do something about it. The main problem is that contrary to present-day English in standard German the labiovila approximate doesn't exist. Thus we have a typical Inventorial problem and many Germans use a labiodental sound instead. Why is this so? In German the letter W is phonetically realized as a voiced labiodental fricative V. So we have vassa, wine, wind and so on. Thus it is not surprising that Germans pronounce words that begin with a W in present-day English with this initial labiodental fricative. But how can we get rid of this typical German accent? Well, if you're unable to produce the labiovila approximate use the vowel U which is very similar to it instead. So we get water. Then gradually shorten the vowel until we automatically get water. So you have to do water, water, water, water. And at the same time watch your mouth in a mirror and make sure that there's always a small orifice between your rounded lips. Okay, now you can say water, wine and wind, can't you? I hope my advice helps and you will no longer find it difficult to produce present-day English words with labiovila approximants.