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Hello I am a nw member who lives in Warrington, Cheshire, United Kingdom.
I have a 2004 SLK200 that has an intermittent starting fault. I can switch on the ignition and illuminate all warning lights. I turn the starter and nothing happens. I retry with varying results sometimes it starts straight away, other times after a number of activation.
I have had a full Mercedes diagnostic check with no faults found. I have replaced key batteries and have been advised to check the car battery level when the car refuses to start. with the ignition still on after failure to start the voltage shows 11.90volts. Switch off the ignition and it shows 12.40volts. There is no regular pattern to this but it is more likely to happen when the engine is cold, but this is not always the case. Can anyone advise please
 

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Premium Member 2010 SLK300 2LOOK
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Registered 2014 SLK250
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Several possibilities. Automatic, yes? Try the neutral switch first as it is easiest - with the ignition switch in the start position, with your other hand gently wiggle the gear selector.
The ignition barrels can play up on these cars, so that is the next port of call, then it could be a sensor on the crankshaft. If none of these then it could be the starter motor.
Who carried out the 'full Mercedes diagnostic check'? If it was a dealer, they should know all this - it is a common enough fault...
 

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Hello I am a nw member who lives in Warrington, Cheshire, United Kingdom.
I have a 2004 SLK200 that has an intermittent starting fault. I can switch on the ignition and illuminate all warning lights. I turn the starter and nothing happens. I retry with varying results sometimes it starts straight away, other times after a number of activation.
I have had a full Mercedes diagnostic check with no faults found. I have replaced key batteries and have been advised to check the car battery level when the car refuses to start. with the ignition still on after failure to start the voltage shows 11.90volts. Switch off the ignition and it shows 12.40volts. There is no regular pattern to this but it is more likely to happen when the engine is cold, but this is not always the case. Can anyone advise please
Hi Tony, welcome to the forum.

Highlighted above. Can you clarify.

Do you mean that the engine is cranking/turning over OK on the starter but just does not fire and start. OR Do you mean that the starter is not cranking the engine over at all.:|
 

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Hi Tony, welcome to the forum.

Highlighted above. Can you clarify.

Do you mean that the engine is cranking/turning over OK on the starter but just does not fire and start. OR Do you mean that the starter is not cranking the engine over at all.:|
No cranking. No reaction to turning the key
 

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Premium Member 2004 SLK200K
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Have you checked that all the battery terminals and earth to the chasis are extra tight ?
Is the battery original , it may be time for a new one ?
 

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Welcome to SLKWorld.com: The #1 Mercedes-Benz SLK Forum from Valrico, Florida!



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No cranking. No reaction to turning the key
Is your car Auto or manual transmission ?

In general - With Auto transmission there is a isolating device/switch that will prevent any attempt to start if the gear shift is not in PARK OR Neutral. Sometimes this switch can malfunction which can have this effect.

There are of course many other possibilities.
 

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Premium Member 2009 SLK55 AMG
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Welcome from the Sacramento Valley SLK Enthusiasts!
 
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Premium Member 2005 SLK55 AMG
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Hi and welcome from the UK Midlands! :)

Some good suggestions already, and I can't add anything to those already given... hope you get it resolved quickly and easily.
 
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Premium Member 2005 SLK200K
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Hi Tony and welcome to the forum from sunny France.. :smile::smile:

Darn nuisance that this is an intermittent fault...as these can be notoriously difficult to rectify..

I'm sure you have already checked all lead connections are tightly made..

Battery condition is critical with our lovely cars... keeping them fully charged is essential..

will be following this thread with great interest .. good luck..
 

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Premium Member 2008 SLK55 AMG "Mabel"
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Hi, welcome from the North of Scotland. :smile:
 
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