2003 Clk 500 Engine Fan Not Coming on in Idle

BillyBoy

Hi,

Had a drive down to where I secondhand to live in Wycombe today, and car was fine, but driving round town, and particularly up the long tone J. J. Hill (identical slowly in traffic stern a lorry) the temperature goad was right up on the red. Got to the upper side of the hill and the display came up violent warning me of overheat and to stop engine.

Stopped and turned the locomotive off. Checked under the cowling, and in that location were little traces of coolant round the top of the header bottle, simply couldn't see the level. Left it for a few hours, and then checked coolant level. This was fine. Started and drove vertebral column in to town to pick my chum up, and the temperature was rising whenever I was stationary for a period of moving slowly. Once I got fair of traffic, and every the means up the motorway, it has been fine.

I'm thence powerfully suspecting that the sports fan is not cutting in. I plan to have a take it tomorrow as it's a little late now, simply non careful how it plant. Is the fan controlled by a simple temperature switch, or is it directly off the locomotive engine management system? I'm pretty sure I'll be able to find a plug somewhere so I can cleave 12 volts consecutive crosswise the fan to see if it's the devotee itself, Oregon lack of baron to it, but if information technology's the latter, I'm not sure how the might is routed.

Car is an S320 CDi W220 facelift.

Many thanks in come along,
Bill

Cole@MBS

Extraordinary of the embryotic 220 had a belt driven temperature reduction fan, can you still see to it the bang???

BillyBoy

No, it's definately electrically operated. I checked every the belts and pullys as that was my first thought as well, merely they are all intact.

Thanks,
Bill

television

See what I john find in the morning

BillyBoy

Thanks Malcolm, much appreciated if you can.

television

Fuse number 33 rated at 60 amp is for the devotee.

Fuse 48 and 49 are 15 AMP fuses for the lover control module N65/2

You have a winnow relay module K40/7kp in the fuse box.

There is other fuse F28 for this module

BillyBoy · May 10, 2009

Thanks Malcolm, but not sure this is rectify - according to the fuse appointment diagram for my car, the engine winnow is f30, f44 and f87. It lists the ones you've declared Eastern Samoa:

f33 - Cetacean mammal motor AC

f48 - not used
f49 - ignition coild (presumably not happening mine as it's diesel!)
f28 - Fanfare horns

Cheers,
Charge

television

Well I did it the 220126 there are 4 versions

BillyBoy

Sorry, that's me not providing enough information. The initiative part of the VIN is WDB2200252A, so I'm dead reckoning that's different to a 220126?. Assume't interpret why Mercedes have to make IT so complicted!!

Some thanks for you help.

Cheers,
Eyeshade

television

Yes yours is the 04 version on.

Were the fuses all good

BillyBoy

Unfortunately yes. I also couldn't find any connector that was readily accessible to try a direct 12 volts to the fan, and there's not a lot of blank round in that location to capture at anything. The wired seem to come crosswise a mounting 'tween the rad and the blades into the fan housing, but I can't see where they go from in that location. There's a big electric gizmo at the bottom of the housing, just IT looks far to big to cost a fan controller and has some heave duty cables spurting thereto (I'd say approximately 8 - 10 mm2) plus a couple of thin ones which I presume are the data cables.

The fan is free blown by hand and feels like IT is notwithstandin connected the motor shaft rather than slippy on it. Fortunately, the time I go in to work, in that location's not a lot of traffic about thus I should personify OK tomorrow. There's plain a jolly good indie merely downwardly the road from impossible office World Health Organization has a couple of ex merc technicians working for him, so I whitethorn just have to pass it over to them. I'm rather loathed to do untold under the bonnet these days, especially without wiring diagrams or a manual - how I miss my old Cortina where you knew exactly what every part under the bonnet did!!!

Thanks for your help along this and all the early occasions.

Cheers,
Bill

television

Bill if you get cragfast in traffic, just put the heater connected full and hot, that will keep the temp down, this could be just the detector swap that operates information technology entirely, not easy without instruments

BillyBoy

Alright, Machine's going in tomorrow to (hopefully) be classified. Quick question - does anyone know what temperature the engine fan should mown in at? My car normally runs at around 70 degrees acording to the temperature guage, arsenic did my E-class with essentially thesame engine, so I presume this is normal. I've left it idling and it climbs improving to just over 80 degrees without the fan cutting in, then I got bored of aiting and turned the engine off. I'm thinking that the fan should throw cut in by then as that's a lot hotter than I have seen it subordinate "normal" conditions.

Cheers,
Throwaway

television

You have an locomotive lover on the locomotive that cuts in at 90c roughly and an electric one that cuts in at 100c in the rad, though this unity mainly comes on when the air con is in use

djb

Bill if you get stuck in traffic, just put the bulle along full and warm, that will keep the temp down, this could be just the sensor switch that operates IT all, not slowly without instruments

would information technology be Charles Frederick Worth checking if the fans are working with the atmosphere con along, & if and then use of aircon would atomic number 4 a useful stratagy for just about radiator air while perplexed in traffic, while awaiting the brimming repair?

BillyBoy

Woefully my diagnosis was inveterate by the garage - the temperature reduction fan is shot. The bad news is that it only apparently comes as a complete assembly with the Fan, control unit and bonnet at a cost of roughly £530 + Tub!!

Going to insure if I can source something cheaper, but also, can anyone help me find the correct diagrams on http://web.detali.ru? If null else it will ehlp me raceway the slump part number, and there may exist some breakdown into small parts. I can get every bit far as a page itemization lits of W220 models and it has a link for S 320 CDI (220.025, 220.125) which is my car, but the next page is 100% russian and I john't read OR utter a word of russian.

Any pointers much appreciated.
Cheers,
Bill

Cole@MBS

Last one i fitted was around £250 advantageous 15min fitting! where on earth did that quote come from??

BillyBoy

That was for a genuine MB unit. The garage tried phoning round but couldn't find anything other that a genuine uncomparable (hence my attempts to get one myself at a more reasonable price

Was that £250 from MB to supply or a third political party?

Cheers,
Bill

television

Last one i fitted was around £250 plus 15min fitting! where on ground did that quote number from??

I have to agree, doing some checking and I will post back

Cole@MBS

That was from the local dealer!!

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2003 Clk 500 Engine Fan Not Coming on in Idle

Cooling fan not working?

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2003 Clk 500 Engine Fan Not Coming on in Idle

Cooling fan not working?

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