A remote-diagnostic judgement is difficult; a comparison with a display piece in the Montblanc specialist shop is sensible. If a defect is actually present and the purchase is less than two years ago, the clip can be exchanged within the warranty on presentation of the receipt free of charge at the factory. Outside the warranty, the repair costs for a clip exchange move between about 49 and 79 euros, which at the new prices of the writing instruments counts as appropriate.