S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Aftermarket Stereo is draining the battery

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Old 07-18-2016, 06:30 PM
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2005 s500
Aftermarket Stereo is draining the battery

I purchased a 2005 s500 4 months ago and had the stereo switched out for a Pioneer dbl din. It's draining the battery. I initially replaced the battery, but to no avail.
Also before changing out the stereo, I went to "Al & Eds" and was quoted a price for the Stereo, Amp & fiber optics wiring, at $3,000 and up. I'm much a lay-person at this and need some input. How will I & how much (approx) to remedy this problem?
Old 07-19-2016, 10:40 AM
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bone stock E55 AMG
moved to W220 forum...
with ignition off, you need to check where it's drawing the battery...
Old 07-19-2016, 07:04 PM
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Mercedes
Who installed the stereo? Take it back there and have them fix it

The stereo was probably wired so it's on all the time. A simple toggle switch added to the stereo power lead will turn it off completely , or you can have it rewired to turn on and off with the ignition

This should not cost more than $30-60 at a reputable stereo shop

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