I had recently noticed that the battery on the 250SE was not in good health. The battery disconnect switch I built a few years ago has a battery health indicator included. Even when connected to the trickle charger it was showing orange. I also noticed that the trickle charger would sometimes go into error mode. My battery tester showed that it was well below where it should be. I had only replaced the W111 battery in the 250SE about four years ago, which is a pretty short life.
I was never happy with the battery I put in the car […]