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Old 03-10-2008, 02:40 PM   #21 (permalink)
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Remark on Post previous!

Good explain there Bazle,
Agree 120%, if you check door seat adjustment panel switches as well... you will find a low wattage solder iron will correct all of the woes there too. Cracked solder joints are the maladay of the majority of electrical accy control issues/woes most will encounter in these vehicles.well....., besides the ecological/enviro. wiring insulation decision... sorry from a couple retired Benz Engineers!
Dietrich...

HHmmmmm, actually I will go and kick the H___ out of Robert for you! He was one of the several main Electrical/Electronic/CAN meatballs! I am more Frame and Mechanical, etc. And heck, seems Dutch was a bit of everything, think he turned the switch on for the place years ago... sorry D

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Originally Posted by Bazzle View Post
Its the current flow to the fuel pump. The orig soldered joints probably cracked (not an uncommon occurance) and the joint resistance increases. This is then a progression of heat, oxidisation etc until the soldered joint fails.

Bazle
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Old 06-22-2008, 05:47 AM   #22 (permalink)
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Great post!!!last week i had the same trouble codes, p1525 p1235 p1236, I checked k40 and i discovered it was in the same conditions, resoldered and supercharger started working again.
lot of saved money!!!!
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Old 07-15-2008, 11:32 AM   #23 (permalink)
apf
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K40 Module - The F4 fuse (40 Amp)

In the diagram they say the big 40 Amp fuse (F4) is for the air pump. The fuel pump just uses a 15 Amp fuse (F5). So the source of heat should be the current for this "air pump".
Question:
As far as I know the 230 does not have an air pump. Yet, still this big fuse is there in the K40 module. Is is not used or what?
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Old 08-19-2008, 01:25 PM   #24 (permalink)
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This thread saved me thousands.. I had thes same error codes and found and solderred the k40 switch points. After driving my SLK230 for about 2 weeks, I now have a problem with starting the car. The dashlights will glow when the key is turned but the engine will not crank. I found a workaround that is hardly acceptable.. I have to disconnect the battery for an hour, then reconnect the battery - wait another hour and the engine will now crank. I've replaced the batteries in the key, rechecked the k40 relay and also centered the ignition key collar. The dealer says it might be the Crank Position Sensor. I have found that mentioned in one posting, but wonder if anyone else has experienced this???
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Old 01-10-2009, 12:11 PM   #25 (permalink)
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had codes p1525 , p1236 , p1235 , p0370,

MB dealer got these codes for me and said that it was not my supercharger as i thought and that it was either the ECU or the wireing going to it,
They then told me that the best way to fix this was to leave the car with them for 3-4 hours and they would check every wire for breaks and if it was not that they would have to get me a new ECU ,
So as you can imagine not cheap, so i decided that i would have a think about it and get back to them.

After searching through this forum i came across this post , so i checked the K40 circuit board and found the burnt out connections,
quick solder, 2 minutes later and a very loud scream. car and supercharger were running like they should.

so the question is , did MB know this was the problem and were they just trying ro rip me off,

either way i'm happy and a big thanks to everyone who posts on this forum!!!

Ant
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Old 02-18-2009, 09:02 PM   #26 (permalink)
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Quote:
Originally Posted by antmez View Post
had codes p1525 , p1236 , p1235 , p0370,

MB dealer got these codes for me and said that it was not my supercharger as i thought and that it was either the ECU or the wireing going to it,
They then told me that the best way to fix this was to leave the car with them for 3-4 hours and they would check every wire for breaks and if it was not that they would have to get me a new ECU ,
So as you can imagine not cheap, so i decided that i would have a think about it and get back to them.

After searching through this forum i came across this post , so i checked the K40 circuit board and found the burnt out connections,
quick solder, 2 minutes later and a very loud scream. car and supercharger were running like they should.

so the question is , did MB know this was the problem and were they just trying ro rip me off,

either way i'm happy and a big thanks to everyone who posts on this forum!!!

Ant
i've been told the very same thing. that my supercharger's linings are clogged and they want me to pay 2500 to fix it. i really think it's the k40, so i'm gonna take a look at it this weekend. i have a feeling they're just trying to rip me off. if you guys have any suggestions, i would really appreciate it if you took a look at my post and try to solve my problem.. thanks!

here it is:
http://www.benzworld.org/forums/r170...e-do-what.html
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Old 02-18-2009, 10:50 PM   #27 (permalink)
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check your k40 first,

2 mins to fix and free

Ant
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Old 02-19-2009, 10:17 PM   #28 (permalink)
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would this k40 resolder work on a 1998 c230?
thanks in advance
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Old 02-21-2009, 12:20 PM   #29 (permalink)
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Quote:
Originally Posted by antmez View Post
check your k40 first,

2 mins to fix and free

Ant
checked my k40, and it's perfectly fine. i don't know what else can cause the non-starting issue. it might actually be the key and the ignition.
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Old 03-17-2009, 05:56 PM   #30 (permalink)
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I would like to thank all for this post. Just saved me tons of money considering I had to fix mine and it took no time to do it with with this forum. Thanks again all.
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