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Discussion Starter #1
I have a 2003 sl500 batteries are charged I was having trouble with my remote would not work door locks but would start car .Then would randomly turn and start .I bought new key from Mercedes dealership fob lights up but works nothing .I cannot tow vehicle because suspension is down until key turns !Please I need help
 

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CURRENT: 2011 SL550, 2011 C300 FORMER: ML350, CLK550 Cabriolet, C240, ML320, 300TD
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What's the vehicle battery voltage at rest and when you turn the ignition to start.
 

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'03 SL500, '03 SL55, '97 SL320, (2) '91 300SL, (2) '91 500SL, '00 S500 -- all for sale
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I presume either the ignition switch is bad or there is no power to it.

There is a 7.5-amp fuse located by the "+" post of the rear battery. If it is good and has 12 volts to it, then I'd probably replace the ignition switch.
 

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Discussion Starter #7
The fuse looks fine I still don’t understand why a factory key two days old doesn’t even work door locks much less turn the ignition .My window went down the other day when I disconnected battery cable
 
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