I have an 85-380SL with only 78,000 miles on it. It only gets about 200 miles per year put on it. In the fall, the last time I drove it, it ran fine. I just tried to start it and the battery was dead. I jumped it to start it, and now it idles at 1500 RPM.
I checked the idle control valve, and it appears to be working fine. It won't pass air when voltage is applied to it. I suspect that the Idle speed control module may be the problem, but I have no idea where it's located.
I have 2 questions, could the battery being dead for an extended period of time cause a problem with the idle. Can anyone tell me where the idle speed control module is located.
Thanks