Radio power drain 1983 Mercedes 300D

[ron59b]

1983 Mercedes 300D, 286,000 miles

I purchased my car a couple of years ago and it did not have a radio. I purchased an after market radio and installed it myself. The radio I purchased has AM/FM/CD Player. I have twice had problems with the main power line causing an electrical drain on the battery.

The first time I actually took the car to the shop and had them discover my problem. The second time I discovered the problem myself. I have connected the main power line to two different sources for power. The last time I used a hot wire that was ran from the fuse box directly to the radio. Each time, once the wire was disconnected the electrical drain was non-existent.

I would like to know if anyone could recommend the proper HOT wire to use as a main and continuous power supply for the radio, which will not put a drain on my battery. Remember I am a DIY person and may not completely understand an answer that is too technical.

Thanks,




Ron