E-Class (W210) 1995-2002: E 200, E 220D, E 240, E 290TD, E 300TD, E 200, E 240, E 280, E 320, E 420, E 430 (Wagon, Touring, 4Matic)

w210 alarm problem?

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Old Jul 29, 2020 | 08:04 AM
  #1  
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w210 e200-97
w210 alarm problem?

i have a problem with my w210 e200-97..the problem is that the car wont start i can lock/unlock the car with the key but when i try to start (red and green flashes alternatively in rear view mirror)..i found out that the alarm wont go off (locked myself in the car and opened the door)

Edit:i have the one button switchblade type key with new batteries

Last edited by Andreas Jonsson; Jul 29, 2020 at 08:35 AM.
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Old Jul 29, 2020 | 09:06 PM
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02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
Originally Posted by Andreas Jonsson
i have a problem with my w210 e200-97..the problem is that the car wont start i can lock/unlock the car with the key but when i try to start (red and green flashes alternatively in rear view mirror)..i found out that the alarm wont go off (locked myself in the car and opened the door)

Edit:i have the one button switchblade type key with new batteries
1) Check your battery tray and area (under the rear PS seat for any water filtration in / damage.
2) Test the battery V at the terminals. Should be no less than 12.4V reading, anything less is a dead battery.
3) Scan and post any saved codes you have.
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Old Jul 30, 2020 | 06:42 AM
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w210 e200-97
Originally Posted by khomer2
1) Check your battery tray and area (under the rear PS seat for any water filtration in / damage.
2) Test the battery V at the terminals. Should be no less than 12.4V reading, anything less is a dead battery.
3) Scan and post any saved codes you have.
I can start it with starter fluid but not without it,and i have fuel to the rail but nothing happens.i read about some relay called k40? Maybe thats a problem?

1)i have no water under the seat just a Lose vacuum hose that Comes up from the floor..

2)the battery is probably not at 12v..but are they that sensitive?

3)i just need to get a hold of a Scan tool first hahaha

Last edited by Andreas Jonsson; Jul 30, 2020 at 07:28 AM.
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Old Jul 30, 2020 | 11:08 AM
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Originally Posted by Andreas Jonsson
I can start it with starter fluid but not without it,and i have fuel to the rail but nothing happens.i read about some relay called k40? Maybe thats a problem?

1)i have no water under the seat just a Lose vacuum hose that Comes up from the floor..

2)the battery is probably not at 12v..but are they that sensitive?

3)i just need to get a hold of a Scan tool first hahaha
These are the simple things to rule out first.
Yes, MBs are that sensitive.

Also, replace your FOB key batteries and test again.

You can inspect carefully your K40 too, for any soldering cracks/issues (that look burnt).
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Old Jul 30, 2020 | 01:49 PM
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w210 e200-97
Originally Posted by khomer2
These are the simple things to rule out first.
Yes, MBs are that sensitive.

Also, replace your FOB key batteries and test again.

You can inspect carefully your K40 too, for any soldering cracks/issues (that look burnt).
yeah nope it was not the car battery

New batteries are in the key (synchronized)

i checked the k40 only thing i saw was just some solder ”residue” but not burnt..

probably something wrong with the transponder in the key..becuse the injectors are not kicking on,Wish i just could bypass the damn immobilizer probably not that easy..one thing more is that the alarm does not go off when i lock the car (me inside and opens the Door)


edit: the transponder is gone in the key I think?
But can i change the immobilizer and get the the key that Belongs to that ”specific” immobilizer? Or do have to change the ECU and everything?






Last edited by Andreas Jonsson; Jul 30, 2020 at 02:29 PM.
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Old Jul 30, 2020 | 02:40 PM
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Originally Posted by Andreas Jonsson
yeah nope it was not the car battery

New batteries are in the key (synchronized)

i checked the k40 only thing i saw was just some solder ”residue” but not burnt..

probably something wrong with the transponder in the key..becuse the injectors are not kicking on,Wish i just could bypass the damn immobilizer probably not that easy..one thing more is that the alarm does not go off when i lock the car (me inside and opens the Door)


edit: the transponder is gone in the key
But can i change the immobilizer and get the the key that Belongs to that ”specific” immobilizer? Or do have to change the ECU and everything?
Lost the pea-sized transponder in the key fob?
Only way for that to happen is the case opened up and it (located in the tiny corner compartment) fell out.
Start looking, back racing your steps.
That chip is married to your system. Only other option is to the stealership for:
1) replacement key fob (possibly with the vehicle and/or proof of ownership) = $$$
2) valet key (same as (1) = cheaper

OR, I believe, you need to replace the entire system with a matching system with keys and cylinder too. = $$$$ and time
Correct me if I am incorrect on this.

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Old Jul 30, 2020 | 03:38 PM
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w210 e200-97
Originally Posted by khomer2
Lost the pea-sized transponder in the key fob?
Only way for that to happen is the case opened up and it (located in the tiny corner compartment) fell out.
Start looking, back racing your steps.
That chip is married to your system. Only other option is to the stealership for:
1) replacement key fob (possibly with the vehicle and/or proof of ownership) = $$$
2) valet key (same as (1) = cheaper

OR, I believe, you need to replace the entire system with a matching system with keys and cylinder too. = $$$$ and time
Correct me if I am incorrect on this.


Is it that thing?

i mean i can get a ignition switch/steeringlock and the immobilizer from another car with the key everything It should work i think..as long as the key that are ”Married” to that specific immobilizer..but in all honesty i have no idea what om talking about,but that is how understand it should work (maybe completely wrong hahaha)

Last edited by Andreas Jonsson; Jul 30, 2020 at 03:46 PM.
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Old Jul 30, 2020 | 09:21 PM
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Originally Posted by Andreas Jonsson
Is it that thing?

i mean i can get a ignition switch/steeringlock and the immobilizer from another car with the key everything It should work i think..as long as the key that are ”Married” to that specific immobilizer..but in all honesty i have no idea what om talking about,but that is how understand it should work (maybe completely wrong hahaha)
Yes, it's missing based on the photo you posted.



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Old Jul 31, 2020 | 01:17 PM
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w210 e200-97
Originally Posted by khomer2
Yes, it's missing based on the photo you posted.

yeah..kinda figured that out becuse the key was in pieces when i got the car...damn previous owner

anyways i ordered a new ignition switch/steeringlock and the immobilizer/key from the same car hopefully that works..sadly it’s the weekend so no shipping...

Last edited by Andreas Jonsson; Jul 31, 2020 at 01:21 PM.
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Old Jul 31, 2020 | 02:29 PM
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hummm,
Well, if you had laid all your cards on the table from the start of this thread, explaining your complete situation, you would have been told:
Contact your local MB stealership, provide proof of ownership and vin#. Order a new key fob (and maybe a valet key too)
Done.
Cheaper than you spending $$ and time swapping the system out.
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Old Jul 31, 2020 | 05:27 PM
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w210 e200-97
Originally Posted by khomer2
hummm,
Well, if you had laid all your cards on the table from the start of this thread, explaining your complete situation, you would have been told:
Contact your local MB stealership, provide proof of ownership and vin#. Order a new key fob (and maybe a valet key too)
Done.
Cheaper than you spending $$ and time swapping the system out.
hahah all cards on the table? With information i didn’t have?

Didn’t even know the transponder was gone in the key becuse i didn’t know what it looked like..

i Rather ”change” the system for under 100$ With parts from a junkyard,than go to a mercedes dealership and order a new key...

Last edited by Andreas Jonsson; Jul 31, 2020 at 06:24 PM.
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