W210 E300 starting problem.

[mad-dan]

Hi, a friend of mine has recently got him self a W210 E300 diesel.

A couple of days ago it decided it wouldn't start. when you turn the ignition into position 3, all the dash lights come on as they should, the srs, abs and heater plug lights turn off, again as they should.
Then the red and green lights mounted in the mirror and the door handle flash alternately. The engine turns over but fails to start.

Does anyone have any idea what it may be causing the problem?

 

[BlackC55]

It is immobilised.

Try the spare key, new batteries and go from there.

 

[mad-dan]

unfortunately, he only has the one key! we have put a new battery in it tho. is there a way to by-pass the immobiliser or if not, exactly what part of the system will need to be replaced?

the car does lock and unlock with no problem...

 

[bigasotonuk]

Don,t be under the impression because the car locks and unlocks that the batteries in the fob are ok as the locking and the immobilisation circuit are separate. Immobilisation side being rather sensitive to undervoltage.
It is a Scorpion alarm that is fitted they were fitted from the factory to make them insurance compliant.
Make sure 'ALL' your red and green l.e.d.s are working as this can cause this as well.
Do a search on here for Scorpion Alarms/alarm there many posts on this problem

 

[mad-dan]

Don,t be under the impression because the car locks and unlocks that the batteries in the fob are ok as the locking and the immobilisation circuit are separate. Immobilisation side being rather sensitive to undervoltage.
It is a Scorpion alarm that is fitted they were fitted from the factory to make them insurance compliant.
Make sure 'ALL' your red and green l.e.d.s are working as this can cause this as well.
Do a search on here for Scorpion Alarms/alarm there many posts on this problem

He has replaced the battery with a brand new one, Just done a search, theres lots of info there, but no one has actualy posted a by-pass for the immobiliser.

if anyone has this info but doesnt want to post it, could you please PM it to me???

 

[bigasotonuk]

I know how to bypass it but i,m not willing to put it on the site the info is in one of the links in the threads.
When mine went like this mine was only intermittent and i managed to get it to MB dealer and a Tech came out and bypassed it for me after inspecting logbook and passport no charge takes about 5 minutes.
If either of you are members of a breakdown service such AA or RAC they will be able to do it too.
Try disconnecting and reconnecting the battery this used to work sometimes too.

 

[mad-dan]

I know how to bypass it but i,m not willing to put it on the site the info is in one of the links in the threads.

Yeh, i have seen the info, just it doesnt actualy say which ones..
You couldn't send me the info by PM or Email could you, or PM me the link to the info Please.

Try disconnecting and reconnecting the battery this used to work sometimes too.

LOL, i have tried that about 30 times so far

Just pulled the floorpan up, theres a lot of wires there! I have started to trace them, but without removing a lot more trim or having a wiring diagram it's a complete nightmare

 

[jibcl500]

Hi, a friend of mine has recently got him self a W210 E300 diesel.

A couple of days ago it decided it wouldn't start. when you turn the ignition into position 3, all the dash lights come on as they should, the srs, abs and heater plug lights turn off, again as they should.
Then the red and green lights mounted in the mirror and the door handle flash alternately. The engine turns over but fails to start.

Does anyone have any idea what it may be causing the problem?

My CL does this or did do rather, turned out the cars battery was failing, you might want to try a fresh battery.
jib

 

[bigasotonuk]

Hi,
Have you located the Alarm Control unit yet? (on a w202 they were mainly fitted on n/s front footwell bulkhead) and the fuse(s)? check they are ok.
Post once you have done this then i,ll PM you

 

[mad-dan]

Hi,
Have you located the Alarm Control unit yet? (on a w202 they were mainly fitted on n/s front footwell bulkhead) and the fuse(s)? check they are ok.
Post once you have done this then i,ll PM you

Yep, it's in the n/s footwell, I have also traced most of the wiring, 2 wires piggy back onto the LED power wires (split into the can-bus cable) and 2 wires split the green cable on abother box.

I presume the 2 wires that split the green cable need to have a short placed accross them, i have tried this, i have also removed the wires that go to the LED's neather have managed to get the car started..

any help you can offer would be great.

 

[bigasotonuk]

hi,
Just rereading your post and now only just realised yours is a diesel apparently different procedure to disable.
Mine i just unplug control unit and short 2 of the pins out.
Try this link and click on the fitting instructions for 1014, 1221, and 1022 as i,m sure one of them is your alarm.

http://www.boopolo.com/alarms/alarm.html

They talk about a coded fuel valve in immobilising a diesel
Did you find 2 inline fuses near the alarm control unit? make sure these are ok as mine looked ok till i went to check them they just fell apart on me.
Thanks to the member of the forum whose's site this link is.

 

[mad-dan]

Well, after 6 hours of tracing wires and completely removing the alarm the problem is still there.

obviously, the problem is with something other than the alarm, looks like tomorrow we will have to cut it up and weigh it in, shame really as its a very nice car.

thanks for the help anyway

 

[230K]

Hi

The only thing that stops a diesel from going is fuel. Is there power to the stop solenoid?? Is there air in the fuel lines????

23oK

 

[jibcl500]

Ive heard its possible to get air in the fuel lines if the tank is below 1/3rd full.
Has any work been done on the car prior to this problem.

jib

 

[mad-dan]

There is no air in the fuel lines and there is no power to the fuel solenoid, presumeably due to the immobiliser, this model must have an immobiliser that is indipendant from the alarm as the alarm has been completely removed.

now, i was tempted to fit a supply via a switch to the solenoid, but looking at all the other electronic gizmos fitted to the fuel system i decided it would be pointless.

does anyone have any other idea's before Mr Stihl goes to work on it?