X350 V6 2004 Engine oil leak

Hello Folks,
Got a persistent oil leak on the V6. Have checked VC’s ; VVT Controller seals. The leak is all over the bottom of the engine so may not be rear crank seal and the front of the oil pan around the crank pulley area appears to be dry. The leak is not heavy. Would be grateful for any advice from members who may have had a similar problem before i start dismantling. Thanx in anticipation. Charlie.