300tdt -82
 

Recently i noticed a small problem on my mercedes ,
after i turned the ignision off the instrument lights and gauges where still on , after i disconnected batterycable the instruments where off , after reconnected the cable and after restarded the engine the problem occured, after turning the key off i still had charging lamp and fuel and temp gauge on, after disconnected the cable again i heard a click sound from somewhere in engine compartment , Is that a problem in the ignition lock or is that a relay problem ?? , all answers are greatly appreciated.
Many thanks Kjell J Sweden.

Probably a bad diode in the alternator. Try disconnecting just the alternator output wire after the key is off.