I have an '82 300D. When I try to start it, especially when it's cold, the starter works very slowly and feels like it is about to die. Seems like a dead or dying battery, but tested it and it's fine.
However when I hit the gas pedal when cranking, it does catch and start. This problem is especially harsh when the car is cold.
Do I need to replace the starter? Is there something else I'm missing? This car is my daily driver and I use it to cart my kids around and get to work, so I'm afraid to be stranded.
Thank you!