hmf sensor?

[Devin]

i had chance to pull some codes on my c36 it pulled about 4 diff. codes. one for engine temp sensor, HMF sensor i think its part of the ingitsion sys. ? any ways the codes that were pulled were all active and none stored in the coputer, the car is a 95 c36 with 171 000 km's on the motor, i had the head gasket done about 20 000 km's ago mb tech guy said that the wires in the engine comp. were very hard,

could this be the engine wiring harness doing it's thing?

i have not been to happy with this car, you can never find any problems with honda's toyota" in reagards to problems with a c36
look like i paid the extra $$$$ for a Fk ing star on the hood with the problems of a KIA. knew i should have bought the M3

no offense to anyone im just venting

Thanks
Devin

[manny]

I'm not sure how many responses you will get with your kind of attitude.
This IS an M-B forum.
Maybe you should buy your Kia, Honda, Toyota, M3 or whatever. :rolleyes:

[misterblack]

what kind of reply is that????

do a search on...."expensive" or "stealership".....you'll quickly notice how many members make the same comments as Devin on this board.

[Devin]

he guys sometimes the truth hurts, just because some of us wont admit that their mb is a piece of SHHH dosent mean others wont, face it u will never see the problems dicussed here found on any other brand such as HONDA and TOYOTA worst msitake i ever made was to buy a car with a star on the hood

Mercedes are supposed to be amongst the most refined vehicles on this planet my POS C36 can very quickly prove that theory wrong

i have driven many other imports up to and beond 300 000 km's with no issues such as my benz has

i dont mind spending the $$$$ on routine maint.
but head gaskets on a benz should be unheard of

[manny]

Originally posted by misterblack
what kind of reply is that????


It's the kind of reply you will get from me when you come on this board whining & using abusive language.
If you can't afford an M-B, don't buy one. ;)

[Devin]

my friend... we own 4 mercedes

*1971 280 sel with the 4.5 motor
*my c36
*2001 c240 droped with HID's
*not to mention the 2001 s430 with the factory AMG kit

if you dont belive me u are more then welcome to view these MERCEDES that are parked in my DRIVEWAY
JUST P.M. me and i will give u a tour maybe ill let u drive one

my original post was in regardz to the reliabilty of the C36,

so please my "friend" dont try make your self superior to me or anyone else by telling them they "SHOULDNT BUY IT IF THEY CANT AFFORD IT" 70% of my family drive BENZES from CLK 55 AGM's to SL 500 AMG's sorry if i hurt your feelings with my harsh language... didnt know you were so sensative

i have worked hard and i mean hard to get to were i am

i even told u that i dont mind spending the extra $$$$ on regular maint.
but why should i be doing a head gasket on a benz

my 1971 starts and runs like a dream better then the C36

Thank you
Devin

P.S. dont hide MODS from your wife.... it's not goog for the marriage

[CKlasse]

Devin,

Sounds like your wiring harness is going out which is another common issue with w202.

Good luck.

[jnenad16]

devin, you should have gotten a C280 and built it up instead of an AMG. I have a 2000 E55 and the only reason I never mentioned it in any of my posts or in my sig is because is hate it. the f****** thing burned, the entire front of it, 15K to repair it, which I wont be doing and I just want to get rid of it. the insurance never paid me cuz they think I started the fire. It also cost me so much to keep it on the road. the only nice thing about the AMG's is performance, every thing else is plain mercedes(nothing special). this is why I despise AMG's.

nenad

[misterblack]

"whining & using abusive language"

does Benz pay you to stick up for them???

btw...he was talking about his own car....not yours.

I think people should try to answer questions instead of telling them they can't afford the car.

oh....I hate Mercedes-Benz car mats...they suck!

(this is funny!!) :)

[Devin]

Thank you gentalmen !, it's all about reliability

also i have found a wiring master that said he would build me a new wiring harness, leave the car with him for about 2 weeks and 800 $$$ and he said that i would love him more then god himself

[Rocky]

First off....what are the codes (numbers) your getting?

Second, wrong section to rant.

Third, if you don't like the car, get rid of it then and never buy another MB and tell everyone that MB's are bad in your opinion.

You should enjoy what you drive and if you don't...move on.

NOt sure how he's going to build a new harness since the problem witht he old harness is that that the insulation on the wires flake off exposing the actual metal wire.

BTW did you buy the car brand new or used and when?

[Devin]

it's not easy to buy a nice c36 let alone trying to sell one dealerships wont give anything for this car any car, and i wont sell the car through the paper because im to honest and i wont do that to someone.

looks like ill have to take the hit for the wiring harness.

the wires can be replaced from plug to plug it's just very very time consuming that's why the guy needs the car for 2 weeks

i didnt get a chance to write down the codes, but they all had some thing to do with.... short/malfunction detected which = wiring harness, 4 diff sensors cant go all at once

i figure ill just continue to drive the car untill it completly dies on me and then spend the $$$ one time

all my other MB's fun perfect

wish me luck

[jnenad16]

devin,
dont take a chance with it, if the harness is frayed, dont drive it, it could catch on fire.

nenad

[Rocky]

Is he replacing the wire by splicing and putting in new ones cause if he is, i wouldn't go that route. All the wires are insulted with the same material not just the area where you see damage. If you just splice the wires or re-wrap them, another part of the harness may go. Better to just get the updated part with no degradable insulation.

You do understand that the engine wiring harness is basically the nervous system of the car where almost every electronic component in the engine is connected too right?

[Devin]

im not worried about the car catching fire cause if it does ill be a happier man

the guy has told me completly new wires, no cutting no pasting.

im just gonna wait till the car completly dies, it cant blow the ecu cause everything is fused shouldnt really catch fire... i feel the most that could happen would be a rough running motor or a dead motor, and then i will take it from there

thanx guys
Devin

[Rocky]

Originally posted by Devin
im just gonna wait till the car completly dies, it cant blow the ecu cause everything is fused shouldnt really catch fire... i feel the most that could happen would be a rough running motor or a dead motor, and then i will take it from there

thanx guys
Devin

Someone blew thier ECU here no? or was that the sister site bnzsport. Anyways, if you blow the ECU, good luck finding a replacement even if you have the cash to pay for it. The ECU is ultra ultra rare to get even from factory.

[SLAMMED_C]

Well the HFM is the MAS (hot film mas sensor) and depending on what other codes you have (like maybe injector codes) it could be the wiring harness.. it was a common occurance with the older W202 cars.. and even the late model 124 cars. MB had a bad run with the wiring harnesses.
and you say $800 and you can have a custom made harness.. I dont think it will cost too much more than that to have it done at the dealer.. see if they will give you some goodwill on the part or labour, dont ask ya dont get right?!

You have to remember that all companies have cars with problems.. some you may never hear about cause you may not have owned one.. but in any case, MB still makes a great car in my mind.
I havent had very many problems with my W202.. knock on wood.

and your comment on MB's needing new head gaskets.. trust me.. I dont see that many head gaskets being done, and if they are dont.. its on older (early to late 80's cars) most of them being 190E's.. hell nothing lasts forever man.. parts fail. be it on a brand new car or one thats 10 years old.

[jnenad16]

Originally posted by SLAMMED_C
Well the HFM is the MAS (hot film mas sensor)

if he has a 95/early 96 year model with HFM-SFI(high frequency modulation-sequential fuel injection) ecu, then hfm code, as devin had indicated, might actually be the ecu itself, or a defective harness. here are some codes:

113 HFM-SFI control unit not coded
113 HFM control unit identification illogical
115 HFM-SFI control unit N3/4 coding bytes illogical
112 HFM control unit faulty
068 HFM circuit/trimming plug short to ground
069 HFM circuit/trimming plug open circuit or short to positive

Hot Film Mass Sensor codes should not be displayed under HFM abbreviation. some MAS codes look like this:

009 Hot Film Mass Sensor- Signal Too High
010 Hot Film Mass Sensor-Open Circuit

nenad

[CKlasse]

Originally posted by SLAMMED_C

and your comment on MB's needing new head gaskets.. trust me.. I dont see that many head gaskets being done, and if they are dont.. its on older (early to late 80's cars) most of them being 190E's.. hell nothing lasts forever man.. parts fail. be it on a brand new car or one thats 10 years old.

Actually on 1995-1996 w202, head gasket is a pretty common prob. They changed it to better metallic type on the 97 or newer.

Keep in mind his 95 is among the very first C36s. I'd blame it on the previous owner for not taking care of these common issues on the earlier w202.

I do agree w/ you, >97 w202 is one of the better daily driver cars you can have.

[SLAMMED_C]

Actually on 1995-1996 w202, head gasket is a pretty common prob. They changed it to better metallic type on the 97 or newer.
Keep in mind his 95 is among the very first C36s. I'd blame it on the previous owner for not taking care of these common issues on the earlier w202.
I do agree w/ you, >97 w202 is one of the better daily driver cars you can have.
I havent seen very many W202's that needed head gaskets.. but I will say that the older W202's had lots of common problems.. but again its the same with any new model car or car in the first year or two of prodution.. there are always problems for the first while.. parts being updated.. corrected.
I blame the manufacturer of the part.. not MB because it was a defective part.

[Rocky]

my 1997 had the head gasket problem.

[Devin]

hey guys i decided to reset the computer, unpluged the batt. for a few min. and hooked it back up it's been about a week now and no engine light, this must have something to do with the wiring harness.....just gonna keep driving it

thanks
devin