Help! Occasional Starting Failures! - Page 5 - PeachParts Mercedes-Benz Forum

thegirlilove · #61 03-16-2005, 05:02 AM

Thanks for your reply shoebox,

Quote:

It didn't throw any codes and few people recommeded changing the crankshaft sensor. It only after happened after a very short drive. It solved the problem.

So where is this crankshaft sensor located? and how much did it cost you?

Shoebox · #62 03-16-2005, 02:08 PM

not sure. my mechanic did the swap. i can't recall the price, i do remember the part cost more than the change.

Norman123 · #63 08-25-2007, 12:40 PM

Good morning Ozzy,

I have an 1996 E320 that is having a no start isuue (Engine will crank but it will not start), and your information and technical advise is outstanding.

I was following your thread (below in red)to find out if the HFM is locked out, but the thread was terminated before you can give the additional steps. I have not performed the first steps yet but if I get an answer from you will be happy to do them. I appreciate any help, I have tried many things but I have not been successful.

Thanks

Norman

This is what I would do, connect a battery charger to batt and turn onto lowest charge position, this will ensure battery doesn't go flat.
Turn the key to position two (all lights come on in cluster), and then turn back off and remove key. Do this 20 times, how many times did you get the dreaded alternating green and red flash??. If "0" you may have to try another 20 times, but first, hop out of car, close the door and lock/unlock car.
Make sure you note down exactly each turn of the key and what the result was.
Once you have done this, post back the results and I will tell you what to do next.

lukejr · #64 07-31-2009, 08:11 PM

Great infomation on this issue. This past week the same problem has started to happen to my 1995 C-Class W202 C200 car. I haven't had a chance to bring car to garage yet but will do on Tuesday morning if it starts.

Quick question, should I lock and unlock the car each time or is it enough just to take key out and try again?

The alternative red green lights flashing is driving me nuts.

Thanks again for posting here, great help.

lukejr · #65 08-02-2009, 09:13 PM

I am interested to know if the ignition switch could be the problem with my W202?

About a month before the alternating red green rear view mirror led flashing problem on start, the car wouldn't turn off. I had to stall in 5th to turn off.

Four days before the start problem the car started to turn off, and then it stopped starting. I am interested to know what is it in the key the immobilizer reads? My understanding is that the batteries are only for lock/unlock and that the ignition that checks back with the immobilizer doesn't use the batteries. Can anyone confirm this?

I want to start isolating the problems with this as I want to keep repairs costs on a 1995 car to a minimum. Thanks again for help and great forum.

RickyLiew · #66 04-08-2013, 04:33 PM

Hi good day
I m having problem with this 1995 C280 intermittent wont start n no trouble code.. Infra red key battery replaced n working fine, rear mirror unlock with IR remote with green light n lock with red light flashing, engine control unit. Cam sensor, Crank sensor replace but still most of the time wont start.. but some time if it start car can run for whole day without problem but key off n try start again mostly wont start again..
getting no where to fix this MB.. really need ur help,,
Thanks from
Ricky

hugh12231 · #67 10-27-2013, 05:15 AM

Quote:

Originally Posted by ozzy

Its not the IFZ that prevents the engine from starting its the HFM, the HFM is always locked until it recieves a CAN message from the IFZ, so as soon as you turn your ignition on, the HFM is powered up and then it waits for transmission on the CAN data bus.
The DAS infrared control module (IFZ) evaluates the transponder data transferred and, if valid, releases the engine control via the CAN data bus.
now if the key, transponder coil and IFZ were all working as they should and validation is then put onto the CAN data bus, then the IFZ has done everything it needs to do, from here on its up to the CAN data bus to deliver validation to the HFM, but if it gets to the HFM and the HFM wont accept validation (fault in HFM) the engine will not start.
As far as coding the HFM, this is refering to version coding i.e: what eng, what transmission, what body type, what country etc. when a new control unit is fitted these codings are directly transfered to the new control unit, If HHT (hand held tester) can't communicate with the control unit, you would then have to enter codings manually. these codings are generally YES/NO options. The IFZ would not be part of version coding because its not an option.
I realise this is all a lot to take in and understand but hopefully it helps

ozzy you plonker you are giving the wrong information regarding this particular vehicle,
the 1995 w202 c280 uses the 210 820 21 26 IFZ it does not have a transponder coil as it has a single button flip key remote. it was not until 96 97 that benz switched over to the infrared/rf ignition.
if you are a merc tech you would know this