2.0 Automatic Cooling fan sensor

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2.0 Automatic Cooling fan sensor; MB unsure which one to order
Topic Started: Mon Jul 6, 2009 1:07 pm (214 Views)
Mike wantza Merc	Mon Jul 6, 2009 1:07 pm Post #1
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	I've decided to replace the temp sensor which interupts the fan power, as I'm concerned it's getting all the way upto the red (120 degrees plus) before cooling back down. My local MB direct man has given me a list of 4 available part numbers for the 'sender unit' as Mercedes call it, and I've typed them below with their individual descriptions, but he can't tell which one I need...could anyone help please? (I have no idea what 'Polig' means) 1: A 006 542 56 17 Sender Unit, Continuous Injection System, 2 Polig 2: A 006 542 77 17 Sender Unit, Continuous Injection System, 2 Polig 3: A 008 542 32 17 Sender Unit, Continuous Injection System, 4 Polig 4: A 006 542 34 17 Sender Unit, Continuous Injection System. On the print out he gave me, my chassis number appears next to the part number, but I don't know if that is confirming number 1 as the right one, or just confirming the criteria of the search on my chassis. What do you think? Once I know for sure, I'll get it ordered and fitted. There are two plugs attached to the top of the sensor, see picture Thanks in anticipation, Mike Edited by Mike wantza Merc, Mon Jul 6, 2009 1:09 pm.



balamb37	Mon Jul 6, 2009 3:59 pm Post #2
Member Posts: 569 Group: Members Member #3,881 Joined: February 25, 2009	To me the 'Discription seems wrong, you need a ' Thermal Switch 2 polig' not a 'Sender unit' and it switches at normally 100 degrees celceus. Maybe someone else will come up with an answer. The single pole is for the 50 degree induction pre-heater. Edited by balamb37, Mon Jul 6, 2009 4:01 pm.



Mike wantza Merc	Mon Jul 6, 2009 6:22 pm Post #3
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	The print out from the MB dealer shows the sensor as item 95, ( I tried to put the printout from the dealer up on this thread but it wouldn't have any of it), and then the accompanying sheet describes item 95 as the descriptions I've posted. Trouble is there are 4 and neither they or I know which one to order, as they're non-returnable, so it needs to be correct. Regards, Mike Edited by Mike wantza Merc, Mon Jul 6, 2009 6:29 pm.



aemt	Mon Jul 6, 2009 6:49 pm Post #4
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	I got a new fan switch/sensor recently for a 2.0 auto 1992. Part No MA0065459124 - 01030372 Switch Automatic. � 18.20 plus Vat.I will try and verify on the parts site later if someone else does not confirm



charl44	Mon Jul 6, 2009 6:53 pm Post #5
Member Posts: 1,931 Group: Members Member #243 Joined: April 10, 2006	Here you go Andy, http://www.mercedes-benz-parts.co.uk/index.php?option=com_virtuemart&sku=A0065459124&Search=Go&page=shop.product_details&flypage=shop.flypage&option=com_virtuemart Ian



aemt	Mon Jul 6, 2009 6:57 pm Post #6
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	There you are Mike. Ask and you shall receive. Thanks Ian



Richy190E	Mon Jul 6, 2009 8:07 pm Post #7
Sales Rep Posts: 1,832 Group: Members Member #1,387 Joined: June 9, 2007	Sorry for not replying to your pm mike, been frantically busy and hadnt had time to check. It looks like you're sorted now though and publically for others to see in the future.



balamb37	Mon Jul 6, 2009 8:13 pm Post #8
Member Posts: 569 Group: Members Member #3,881 Joined: February 25, 2009	Trouble is that number doesn't match any of the numbers 'Mike want'saMerc' got from his dealer. And the photo he has put up looks like he has got the Double sensor (switch) which also switches the 'Manifold Preheater' or at least something else as there is three poles on it two for the fan and the only thing I can see that takes only one pole is the pre-heater Edited by balamb37, Mon Jul 6, 2009 8:22 pm.



Mike wantza Merc	Mon Jul 6, 2009 8:23 pm Post #9
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	balamb37 Mon Jul 6, 2009 8:13 pm Trouble is that number doesn't match any of the numbers Mike got from his dealer... Could it be a compatible part from another Mercedes...sorry, I have not been able to access the link yet. I think my virus software is denying me access, under suspicion of a problem, but I will keep trying. edited: I got onto the site and put the 4 part numbers I've got into the search and the prices vary from �22.77 upto �52.27! I will give them a ring in the morning with my VIN number and ask again. Thanks everyone. Once again the forum has the answer. Edited by Mike wantza Merc, Mon Jul 6, 2009 8:33 pm.



aemt	Tue Jul 7, 2009 6:09 am Post #10
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	Yep. I would agree. Does not look like standard sensor.



aemt	Tue Jul 7, 2009 7:05 am Post #11
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	Right the following explanations attach to your 4 part numbers as sequenced at top of post 1 Not for retrofitted Cat Vehicles 2 Only on retrofit Cat vehicles 3 Only for use on vehicles equioed with cat 4 For vehicles equiped with air con. I suggest you check you Vin sheet and see if cat original. If so it should be the third option?????? I have to confess to being confused though. Mine is a 92 2lt with cat and uses the two pronged sensor with the part number I added earlier in the post. Edited by aemt, Tue Jul 7, 2009 7:18 am.



Richy190E	Tue Jul 7, 2009 7:16 am Post #12
Sales Rep Posts: 1,832 Group: Members Member #1,387 Joined: June 9, 2007	The part number will be on the old switch somewhere. The 2 pins on mikes switch are for the fan clutch and the instrument cluster i believe.



aemt	Tue Jul 7, 2009 7:26 am Post #13
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	If you look at your diagram from the parts store No 98 is the water tem & guage switch. 95 is a sender unit for a continuous injection system. My part number is for 98 the water temp switch and guage. I think you are looking at the wrong part.



Richy190E	Tue Jul 7, 2009 7:34 am Post #14
Sales Rep Posts: 1,832 Group: Members Member #1,387 Joined: June 9, 2007	The one you have Listed mike looks like the round plug a bit further back on the cyl head.



Mike wantza Merc	Tue Jul 7, 2009 4:39 pm Post #15
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	Okay chaps,... Richy, the component I am intending to replace is the sensor at the front of the cylinder block..remember the plug you disconnected to short out the pins to lock up the fan? ...... that is what I thought I needed to change (detailed as item 95 on the diagram) Now, aemt, the part you suggest (item 98 on the diagram) appears to be hidden from view on the engine, is this beneath the sensor once it's removed? So, I think I need to buy the other item too, and then fit them both together.... and that looks difficult, how the hell do you get a spanner on the nut on the sensor??



aemt	Tue Jul 7, 2009 5:07 pm Post #16
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	Item 98 is the temp sensor/switch which sits to the front right of the block. Part No A0065459124 Switch Automatic. Set to 100 degrees - the larger brass part unit. I suspect 95 is one of the two senders behing the temp switch. It is a sender unit for a continuous injection system. Edited by aemt, Tue Jul 7, 2009 5:14 pm.



balamb37	Tue Jul 7, 2009 5:13 pm Post #17
Member Posts: 569 Group: Members Member #3,881 Joined: February 25, 2009	It looks like the 'Combination Switch' the two pin plug for the fan, and the one pin plug for the Temp gauge on the instrument cluster. Could be wrong but there will be a number on it somewhere.



Mike wantza Merc	Tue Jul 7, 2009 5:52 pm Post #18
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	aemt Tue Jul 7, 2009 5:07 pm Refering to your photo above... That's what I've purchased today from GSF. Is that all I need to change? Just want to say thanks to you guys, this is excellent stuff.



aemt	Tue Jul 7, 2009 5:58 pm Post #19
Member Posts: 2,907 Group: Members Member #3,171 Joined: September 1, 2008	if your fan has not been cutting in or cutting in at a very high temp then this is the part you need to replace. It is awkward but not tight so easy to remove and replace. No washer.



Mike wantza Merc	Tue Jul 7, 2009 6:28 pm Post #20
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	Smashing, thanks Right, for the record.. Behr Thermoswitch GSF number M93463 Part number: 006-545-9124 Description: FAN/TEMP SWITCH 3-PIN Price: �11.70 + �1.76 VAT = �13.46 Cheers everyone.



Mike wantza Merc	Wed Jul 8, 2009 1:49 pm Post #21
Autophile. Posts: 1,010 Group: Members Member #3,753 Joined: January 23, 2009	Job done, new sensor in and cleaned the engine bay a little bit. Tidied the plug run cover too. You like?



Digby	Wed Jul 8, 2009 4:10 pm Post #22
Member Posts: 74 Group: Members Member #3,690 Joined: January 4, 2009	Just to add a bit of info to this, I was having probs finding out why my temp gauge was not working on my first 190 and was told then which part to get (same as the one above).The fan was fine, bridging the wires showed that, but pushing the plastic part also kicked the fan in, so I just cable tied it to something else to keep a small amount of force on it and it has worked fine ever since! The temp gauge still didn't work though, so I was assuming that the gauge itself may be faulty, but I never looked into it. Now, fast forward to my next recently acquired 190 and I also noticed the fan not working.I pushed the clips etc again, but nothing was happening.I then removed the part from my old merc, cut the cable tie and fitted it to the new merc and the fan kicked in just fine (no cable tie needed either), but the temp gauge (which was fine before the part swap) was now dead as a do-do. So, I have two of the parts listed above and one which works the fan fine but not the temp gauge and one which works the temp gauge fine, but not the fan! I shall be ordering two of those then , but I thought I would share this experience as I had assumed the part either just worked or didn't, I never gave it a thought part of it may work and part of it may not! (both 1992 2.0 autos btw) Edited by Digby, Wed Jul 8, 2009 4:12 pm.



Digby	Thu Jul 9, 2009 4:14 pm Post #23
Member Posts: 74 Group: Members Member #3,690 Joined: January 4, 2009	Another update, I picked up the new part from GSF today, got home, fitted and with the new one, neither the fan nor the temp gauge worked! Wtf?! Duff part maybe? So, I now have one which does nothing, one which only works the temp gauge and one which only works the fan.Do I have 3 different ones for different cars or summat?! I have currently gone for the one which only works the temp gauge and have two wires bridging the fan cable and have run them into the cockpit, at least that way I can put the fan on It aint pretty, but I want to take the car to the retro car show, so it had to be a quick lash-up lol.



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