1989 560SL 60000 miles From California Location Vancouver
Hey I’m new here but I have an issue with my grandfathers 1989 560 sl with 60k miles. It sat for 5 months in a storage locker and my father and I took it out and it drove fine. A week later we noticed it was idling at 1500 rpm we were worried so we checked under the hood nothing noticeable and we went home and did some research my best guess is that the Over voltage protection relay needs to be replaced which I bought off ebay and arrives tomorrow. I also jumpstarted the car and inverted the plugs and steam/smoke came out of the battery if that means anything. If anyone could help that would be great.