Members: I have a 1994 E320a Convertible that has 50K miles on it. Ive replaced or repaired just about everything on this car. Lately its been giving me trouble with starting. I think that its the alarm system as the car is not getting a spark when this happens. Has anyone ever had to replace the security system? And just how much was the cost to replace it? I dont understand how a car with such low milage as mine could constantly give me problems.