When I try to start the car the first time each morning, it turns over slowly and will not start. The engine is turning over but it won't fire up. Using a booster pack gets it started. For the rest of the day, it starts fine with no booster or jumpers. Obviously, the electrical energy in the starter system isn't sufficient after sitting overnight . Subsequent starts throughout the day are no problem. I have a new battery and new cables (there was corrosion between the strands of wire in both positive cables, which I thought and hoped was the problem).

Any advice or sharing of experience with this situation would be appreciated. The car is a 1991 190E 2.6

TA