C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Car won't start. Pointers?

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Old Oct 24, 2011 | 07:00 PM
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euromedic's Avatar
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2002 C320 Wagon
Car won't start. Pointers?

Came back from trip, needed to run errand. Turn over key, everything powers up normally. Turn key to start car, nothing happens. Any ideas? Thanks.
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Old Oct 24, 2011 | 07:31 PM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If the car does not crank check fuse 52 & replace 15A with 20A

If it cranks check fuel pressure is min 3.8 bar. Be suspicious of CPS.

EDIT: you need fuses 31, 52 & 57 to enable start.

Last edited by Glyn M Ruck; Oct 24, 2011 at 07:35 PM.
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Old Oct 24, 2011 | 07:35 PM
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From: NH-NJ
Check starter
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Old Oct 24, 2011 | 07:50 PM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
99.9% of the time it is underated fuse 52 & not the starter motor.
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Old Oct 24, 2011 | 09:03 PM
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if it does not click when you turn the key, check the starter, if it clicks and does not turn over, check your fuel pump. TC
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Old Oct 24, 2011 | 09:23 PM
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From: NH-NJ
Understood. My fuses were fine and it was the starter for me. About 140-50k miles at the time. Always check the easiest cheapest things first.
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Old Oct 25, 2011 | 01:26 AM
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w203 m112
If your lights turn on but you car doesnt event attempt to crank. Doesnt this imply its your battery?

When my battery died, I called MB-Road side and they were able to tell me it was my battery by just having me try to turn on my headlights. They also came out and jumped me for free and I was on my way to getting a new battery.
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Old Oct 25, 2011 | 09:26 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If it is the battery. Your lights will generally come on but dim substantially when you attempt to crank.
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Old Oct 25, 2011 | 10:11 AM
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2002 C320 Wagon
Well...went to check fuses in all 3 locations, and found significant amount of water in motor compartment panel. All fuses good, but no lights and no crank. Battery appears to have plenty of juice. This could become expensive :-(
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Old Oct 25, 2011 | 10:26 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Water in the front SAM? - not good. Next to check is the starter relay & finally the starter motor
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Old Oct 25, 2011 | 10:46 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
For info:

https://mbworld.org/forums/c-class-w...t-process.html
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Old Oct 25, 2011 | 11:03 AM
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2002 C320 Wagon
Thanks all for pointers so far. Gonna have battery tested just to verify its good.
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Old Oct 25, 2011 | 11:17 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yep - get it properly load tested. If it were battery & would expect you to hear the starter bendix solenoid kick in but not crank.
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