How do you change oil on your cclass w205 since 2014 ? drain or extract oil ? hello, it seems that the official procedure from Benz for any C-class W205 since 2014 is vacuum / extract from the top, can you confirm ? My feeling is that this procedure is not as good as draining, but Benz engineers cannot be totally dumb ? what do you think ? But still, I think that if oil has never been drained in my car, I should at least once try to go where they will drain it to change it. Thank you for your ideas.