BMW Repair: 1991 735i, charging battery, engine cowl

Question
parked the car 3 years ago with no problems I go to start today after charging battery there is no spark

Answer
Although the car sat for three years corrosion still continues.What you are going to have to do is check all the grounds(to make sure they are clean and tight),and really look at all the relay connectors,wires checking for corrosion.Check the relay on the passenger side engine cowl I believe there is a relay.By removing and reinstalling the relays it may clean the terminals enough for a good connection.