E-Class (W211) 2003-2009

Mb e320 cdi w211 04 caught fire by itself

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Old Feb 16, 2020 | 03:30 PM
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Mb w211 e320 cdi 04 sedan
Mb e320 cdi w211 04 caught fire by itself

Hi, can anyone help with the experience or idea of how is this possible?
The car was not driven for a month and it suddenly caught fire under the front hood. The car was left in workshop parking area for painting jobs. According to the photos and judging, the place of origin of the fire is under the coolant fluid tank or close there?
Anyone have an idea that could cause burning in or near this place?





There we can see on bonet where was the source
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Old Feb 16, 2020 | 03:52 PM
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2013 ML350 Bluetec
Was there a coolant leak that may have dripped onto an energized wire? I've had coolant catch afire thanks to dripping on a winch solenoid. Next to one of those Amerigas propane tank swap racks. That was an interesting moment.
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Old Feb 16, 2020 | 07:31 PM
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Car is replaceable, not human life, but glad to hear your ok!
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Old Feb 16, 2020 | 11:44 PM
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1922 Ford Model T / no OBD
Fire on parked car happen to me on Ford, where wiper wires were hot with ignition off and rain water shorten them.
So the only thing that could start fire on MB are the things that had power on.
Meaning stater circuit, main relay (it used to be famous K40 on W210) and few other things.
but than does it really matter at this point?
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Old Feb 17, 2020 | 01:53 AM
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Mb w211 e320 cdi 04 sedan
Originally Posted by rapidoxidation
Was there a coolant leak that may have dripped onto an energized wire? I've had coolant catch afire thanks to dripping on a winch solenoid. Next to one of those Amerigas propane tank swap racks. That was an interesting moment.
I dont know if there was leaking, i guess not, because coolant fluid was on level all the time. The car most of the year is standing with ignition off and locked. Do u have the same e320cdi and caught fire by coolant leaking on winch solenoid?
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Old Feb 17, 2020 | 02:01 AM
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Mb w211 e320 cdi 04 sedan
Originally Posted by kajtek1
Fire on parked car happen to me on Ford, where wiper wires were hot with ignition off and rain water shorten them.
So the only thing that could start fire on MB are the things that had power on.
Meaning stater circuit, main relay (it used to be famous K40 on W210) and few other things.
but than does it really matter at this point?
Car was locked, ignition off and source are around coolant tank or just under.
Its matter, because it could happen to any car what is locked and not working,it was lucky outside not inside garage.
And car was at workshop area waiting for service i wanted to know is it happen by itself caught fire or workshop guys did something idk.
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Old Feb 17, 2020 | 09:14 AM
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Pure coolant is hardly flammable, requires greater 240 F for ignition, but the coolant in a vehicle is diluted 50/50 with water. Diesel fuel is also very difficult to lit up unless its pressurized, but the vehicle was turned off, diesel couldn't spray anyway. There are several highly flammable liquids commonly used in a paint shop.
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Old Feb 17, 2020 | 11:03 AM
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1922 Ford Model T / no OBD
Originally Posted by Benzinsw211
Car was locked, ignition off and source are around coolant tank or just under.
Its matter, because it could happen to any car what is locked and not working,it was lucky outside not inside garage.
And car was at workshop area waiting for service i wanted to know is it happen by itself caught fire or workshop guys did something idk.
Workshop should have insurance for this incident.
At this point we can only guess what happen. Those cars don't start the fire on their own (Ford trucks were famous for burning few houses) so your situation is unique.
Good mechanic should be able to find melted wires who started the fire.
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Old Feb 17, 2020 | 11:52 AM
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Mb w211 e320 cdi 04 sedan
Originally Posted by ot1
Pure coolant is hardly flammable, requires greater 240 F for ignition, but the coolant in a vehicle is diluted 50/50 with water. Diesel fuel is also very difficult to lit up unless its pressurized, but the vehicle was turned off, diesel couldn't spray anyway. There are several highly flammable liquids commonly used in a paint shop.
The fire starting point is under the coolant fluid tank, its easy to see but question is what wires or whats is straight under the coolant fluid tank.. I cant find that. The idea was meby coolant liquid was slowly leaking somehow on wires down there and caught fire somehow.. But also if the car was standing for a month when liquid was leaking then battery should be empty or fuses hited out.. Dont know.


Fire starting place under coolant liquid tank.. Any idea what wires going under or what else?
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Old Feb 17, 2020 | 11:55 AM
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Mb w211 e320 cdi 04 sedan
Originally Posted by kajtek1
Workshop should have insurance for this incident.
At this point we can only guess what happen. Those cars don't start the fire on their own (Ford trucks were famous for burning few houses) so your situation is unique.
Good mechanic should be able to find melted wires who started the fire.
This is unique, lot of people in their all life carrere doesnt know why the f it caught fire and specialy in the place like that under the coolant tank. Nobody cant explane
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Old Aug 23, 2020 | 11:07 AM
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W211

Thats the source of fire under coolant botle. Somebody can halp, what is that?
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Old Aug 23, 2020 | 01:25 PM
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1998 E320 Wagon, 2003 W211 E500, 2003 W211 E500, 1999 W210 E55 AMG
This is unnerving. I've seen an S-Class burning from the right side headlight section under the hood., and others that have had a fire in that area. I myself experienced burned and melted headlight connectors on both sides (W211). I understand it's an issue. Maybe trace that line. This is why I carry a fire extinguisher in the cockpit.
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Old Aug 24, 2020 | 01:23 AM
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W211
Originally Posted by Overheated
This is unnerving. I've seen an S-Class burning from the right side headlight section under the hood., and others that have had a fire in that area. I myself experienced burned and melted headlight connectors on both sides (W211). I understand it's an issue. Maybe trace that line. This is why I carry a fire extinguisher in the cockpit.
Headlights are looking fine, no melted nothing. ill try to trace, but im pretty sure thats the source. Meby somebody have an idea, what is straight under coolant bottle.??
But the wierdest think are that, nobody did not use the car for almost 2 months and then sudenly in one day caught fire. I watched on cctv footage, car just start burn and other wierdest thing are, the fire source was so so strong, it melt coolant bottle full with liquid so easy. Is it even possible to caught so strong fire from that small thing what is under the coolant bottle??
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Old Aug 24, 2020 | 10:26 AM
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Originally Posted by Sandis Valters
Headlights are looking fine, no melted nothing. ill try to trace, but im pretty sure thats the source. Meby somebody have an idea, what is straight under coolant bottle.??
But the wierdest think are that, nobody did not use the car for almost 2 months and then sudenly in one day caught fire. I watched on cctv footage, car just start burn and other wierdest thing are, the fire source was so so strong, it melt coolant bottle full with liquid so easy. Is it even possible to caught so strong fire from that small thing what is under the coolant bottle??
Rats and other varmints have been known to undermine wiring. Just saying.
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Old Aug 25, 2020 | 06:02 PM
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2005 E320 CDI, 2015 GLA 250
Darn. I just left my ‘05 CDI at a paint shop and now I’m curious.

I will say the wiring is biodegradable (Euro Union Law) and the wires in my head lights lost a great amount of insulation. I assumed it was heat from the bulbs speeding the wiring insulation decay. Anyway, I stuffed coiled plastic insulator into the head light assembly around the wires.

Maybe all of the wires should be inspected. An engine compartment can be a pretty hot place.

Regards,
Peter
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