Probably there is a small crack in the grip section at the ring through which ink leaks; the feed itself practically does not come into question as a cause, since it must always carry ink. The problem is to be sent in via the specialist shop as a warranty case to Montblanc in Hamburg. Experience shows that the repair there takes about four weeks and is handled under 'ebonite flat rate, without charge within the framework of the warranty'; after return the pen is tight. A content diagnosis Montblanc generally does not communicate; only the note that drop damages are not covered by the warranty is recorded.