My parents' 1980 Peugeot 505 diesel did the same thing when brand new, for a long time....the charge & oil pressure lights would stay lit for several seconds to as long as a two minutes after a cold start. Dealership never noted anything was wrong. Several years and a battery later, we ultimately found the alternator was bad...a new alternator cured the problem.

__________________
1976 240D "Katja"