[nobjob]

Hi I have a bit of a problem my merc is a 2003 e270 cdi w211 i had a problem with the passenger recognition matt but have that resolved now the problem is the computer is coming back with "no fault codes" so everything is good but the dashboard still has the warning message showing and the SRS light is flashing the computer cannot reset the instrument panel, I thought this would automatically reset itself but has not the computer being used is a MB computer and says cannot communicate with instrument panel, can anyone help me with problem thanks, Nigel

 

[Noodles]

The light flashing is not a cluster problem. It is coming from the SRS module under the ashtray. Run a quick test and make sure all restraint systems have a check mark. If one
has a [!] or F then that is what is causing the problem.

 

[eric242340]

Does the computer connect with the SRS system?

 

[nobjob]

done that and yes all airbag and restraint system have a check next to them the only one that has an [!] is the instrument cluster, there are no fault codes coming up at all the computer says everything is ok

 

[nobjob]

yes the computer connects to the SRS system and all is fine but for some reason it will not clear from the dash and the computer cannot connect to the instrument cluster to clear it, getting a bit pissed off seeing the srs light keep flashing for no reason,

 

[eric242340]

Just wait a minute here, is the SRS light flashing or the seat belt warning light? Try fastening your seat belt and see if the light stops flashing.

 

[nobjob]

no no its the srs light is flashing the seat belt light is working fine..and the message say srs restraint system faulty visit workshop.. but when plugged in it comes back "no fault codes present" but cannot clear the fault from the dash

 

[eric242340]

no no its the srs light is flashing the seat belt light is working fine..and the message say srs restraint system faulty visit workshop.. but when plugged in it comes back "no fault codes present" but cannot clear the fault from the dash

Have you run the short test and looked at the fault codes on other systems? Many of these systems are connected and the fault may not actually be shown on the SRS system.

 

[nobjob]

all fault codes were cleared but fault remained on dash, and i drove the car for a while then it was plugged in again and it says no fault codes present, but the dash is still telling me there is a fault i thought this would clear automatically but it did not so tried going into the instrument cluster to clear it with the computer and the computer returns saying it cannot communicate with the instrument cluster and it is the right MB computer that is being used.so not sure what to try next

 

[harisE320]

hey ppl i have diagonosed the problem of OVP replacement or fuse replacement on my 2004 w211 e320cdi through going over different threads.. But i cannot find where it is on the W211.. i could'nt find it.. can somebody help!!

Thanks

 

[eric242340]

all fault codes were cleared but fault remained on dash, and i drove the car for a while then it was plugged in again and it says no fault codes present, but the dash is still telling me there is a fault i thought this would clear automatically but it did not so tried going into the instrument cluster to clear it with the computer and the computer returns saying it cannot communicate with the instrument cluster and it is the right MB computer that is being used.so not sure what to try next

It does sound like there is a problem other than the SRS, try disconnecting the battery for 10-20 minutes and try again.

 

[nobjob]

thanks for the thought bit I tried that yesterday nothing happened, i have not any more ideas think i will have to take it to the dealer and just hope its an easy fix, once again thanks for your help,Nigel

 

[Diesel Benz]

yes the computer connects to the SRS system and all is fine but for some reason it will not clear from the dash and the computer cannot connect to the instrument cluster to clear it, getting a bit pissed off seeing the srs light keep flashing for no reason,

How did you conclude the SRS light at the cluster is flashing for no reason? Sounds like you have played with the control unit and it is now not locked, this is shown by a flashing SRS light at the control unit once ignition is switch on (after a few seconds and keeps on flashing). You have to lock the control unit to the car (VIN). I cannot remember the exact menu from Star but if you were able to open it, you should find how to close the coding.

Remember to double-check that there are no fault codes when closing the SRS control unit.

 

[nobjob]

thanks diesel benz, I will go back and see if I can sort it I am sure its something simple that I have missed, god damn computers can be a pain sometimes!!

 

[eric242340]

thanks diesel benz, I will go back and see if I can sort it I am sure its something simple that I have missed, god damn computers can be a pain sometimes!!

Go to the SRS section and scroll down to programming. enter and check the coding. Also check the coding via CGW or ZGW.

 

[Noodles]

Wouldn't he have to have been in developer mode to unlock or clear an module? Even
then I don't know that it is possible to "divorce" the SRS module from the VIN.
At least that is what the training on the repair is after a crash and they come out of
the body shop. Install new unit, code to car and test systems.

Once they are locked to the VIN I thought it was forever.

 

[eric242340]

Wouldn't he have to have been in developer mode to unlock or clear an module? Even
then I don't know that it is possible to "divorce" the SRS module from the VIN.
At least that is what the training on the repair is after a crash and they come out of
the body shop. Install new unit, code to car and test systems.

Once they are locked to the VIN I thought it was forever.

So did I.

 

[Noodles]

It is locked to that VIN. I checked on Startek info.

There are places that claim to be able to reset them. I have no experience with those
units. I have initialized new ones into a few models at the body shop.

So we are left with a bad connection or a faulty SRS module.

 

[Diesel Benz]

If you change settings for the SRS module e.g. via Special functions (add/remove components etc.), you automatically unlock the the control module. In some cases the module is locked automatically too after the Special functions coding but not always.

The unit may still be coded to the correct VIN but the control unit is not locked IF the SRS light keeps on flashing after some time since ignition is switched on.

Looks like for the W211 you don't even need the special functions password to go to the menu Control unit adaptations, special settings, control unit is released. DAS responds "Control unit UNLOCKED". DAS also gives a hint about a further procedure: Perform coding with menu "Initial startup", this way the control unit is locked again (but shall not be done if fault codes are present, in this case there were none and this should be safe).

I'd also suggest reading WIS carefully. There is a document that explains what the flashing SRS light means although it is quite hidden and a bit difficult to find (I can help you if necessary).

I've seen this on other cars and I would be surprised if you cannot solve this issue as explained above (although my experience was from another car where a special functions password was needed to get the control unit unlocked).

 

[eric242340]

If you change settings for the SRS module e.g. via Special functions (add/remove components etc.), you automatically unlock the the control module. In some cases the module is locked automatically too after the Special functions coding but not always.

The unit may still be coded to the correct VIN but the control unit is not locked IF the SRS light keeps on flashing after some time since ignition is switched on.

Looks like for the W211 you don't even need the special functions password to go to the menu Control unit adaptations, special settings, control unit is released. DAS responds "Control unit UNLOCKED". DAS also gives a hint about a further procedure: Perform coding with menu "Initial startup", this way the control unit is locked again (but shall not be done if fault codes are present, in this case there were none and this should be safe).

I'd also suggest reading WIS carefully. There is a document that explains what the flashing SRS light means although it is quite hidden and a bit difficult to find (I can help you if necessary).

I've seen this on other cars and I would be surprised if you cannot solve this issue as explained above (although my experience was from another car where a special functions password was needed to get the control unit unlocked).

I think this is possible, but the flashing light ref in WIS I cannot find and have been searching for two hours.