[scampirent]

Hi all!

So i try to explaine the probleme.

Yesterday i go home and stop the car. Everything ok.

The morning i mount on the car and, surprise! All lights on cluster (like ignition) on! The fan turn ( speed 1), and i put the key but the car wont start. The starter cannot turn.

The radio dont work
If i leave the key the cluster lights stay on.
The water pump stay on
Small noise from engine like when i put ignition.

any idea?

I try to deconnect the battery and wait but nothing.

Sorry my english is little bad

 

[Noodles]

There are too many possibilities to just guess at the problem.
It need to go to shop that has the correct Mercedes tools or a dealer which will have tools to
diagnose the problem.

 

[DrX]

We understand your English is not fluent. Are these statements correct?

1. When you entered the vehicle, the instrument cluster warning lights (across the bottom) were lit and you hadn't put the key in yet. Yes, and the fan was going too.

2. You did not leave the headlights on overnight. (The left stalk was in the off or auto position.) Yes, they were off.

3. You unlocked the vehicle with the remote key button. No, your remote key lost synch and you haven't been able to fix it. (Check owner's manual for procedure.)

4. When you remove the key, the cluster warning lights stay on. Yes

5. The instrument cluster night-time lights (not the warning lights) are off. Yes

Possible causes:
You left something on and drained the battery. Maybe an interior light.

You have a short circuit that drained the battery.

Solution: Disconnect the negative terminal or ground cable (at the firewall). Charge the battery. Reconnect and attempt to start. Do not jumpstart.

Note: The electrical water pump runs for 1-2 minutes after engine stop. It is normal.

 

[Noodles]

If you disconnect the battery please make sure the key is no in the the ignition switch.

 

[scampirent]

We understand your English is not fluent. Are these statements correct?

1. When you entered the vehicle, the instrument cluster warning lights (across the bottom) were lit and you hadn't put the key in yet.

2. You did not leave the headlights on overnight. (The left stalk was in the off or auto position.)

3. You unlocked the vehicle with the remote key button.

4. When you remove the key, the cluster warning lights stay on.

5. The instrument cluster night-time lights (not the warning lights) are off.

Possible causes:
You left something on and drained the battery. Maybe an interior light.

You have a short circuit that drained the battery.

Solution: Disconnect the negative terminal or ground cable (at the firewall). Charge the battery. Reconnect and attempt to start. Do not jumpstart.

Note: The electrical water pump runs for 1-2 minutes after engine stop. It is normal.

1 at night when i stop the car everything okay. The radio also. The morning like with ignition everything work without radio ( not factory) and starter motor.

2 instruments cluster warning lights stay on without key also. Fan work, electric water pump work. engine is in ingnition.

3 Batterie is okay all lights work correctly,fan work in all position!

4 Remote key cannot work from one year after loss immo code....... so i open the car manually

5 batterie is disconected for one night. Same probleme

I think this is something in the AAM module. I try to look in the schematics if is it possible.

 

[43sqd]

Your problem is being caused by a stuck circuit 15 relay (K12) or a faulty ignition switch.

With the key out of the ignition and the problem is happening, remove relay K12 and replace it with relay K21.

Do the lights on the instrument cluster go out?

 

[DrX]

After you check relay K12, recharge your battery. If the fan was running all night (on speed 1), it could well have used up enough charge to stop your starter from cranking. There can still be enough remaining charge to power the lights and water pump.

 

[scampirent]

Your problem is being caused by a stuck circuit 15 relay (K12) or a faulty ignition switch.

With the key out of the ignition and the problem is happening, remove relay K12 and replace it with relay K21.

Do the lights on the instrument cluster go out?

I unmount the ignition switch connector
same problem

I change two relays
same problem

I unmount all relays
same problem (naturally if fir exemple I unmount the aux water pump relay, the pump stop to work but the inst lights, heater motor ect ect work)

I suspect the fuse box or some ground fail

 

[scampirent]

When you disconnect the connector to the ignition switch, all the instrument cluster warning lights stay on？(Please answer yes or no)

yes


(aux water pump also, heater motor work if i switch on.....)

 

[DrX]

When you disconnect the connector to the ignition switch, all the instrument cluster warning lights stay on?

You might have a short circuit in your instrument cluster. This can disrupt your data network, causing malfunction of your engine control module. (Perhaps a dead cockroach. It happens.)

To remove it, I don't think you have to remove your steering wheel.

 

[43sqd]

I unmount the ignition switch connector
same problem

I change two relays
same problem

I unmount all relays
same problem (naturally if fir exemple I unmount the aux water pump relay, the pump stop to work but the inst lights, heater motor ect ect work)

I suspect the fuse box or some ground fail

Are you saying that you take the connector off of the ignition switch and the light and the aux. pump are still running?

 

[scampirent]

When you disconnect the connector to the ignition switch, all the instrument cluster warning lights stay on?

You might have a short circuit in your instrument cluster. This can disrupt your data network, causing malfunction of your engine control module. (Perhaps a dead cockroach. It happens.)

To remove it, I don't think you have to remove your steering wheel.

removed yesterday to take out the ignition switch connector

same problem

 

[scampirent]

Are you saying that you take the connector off of the ignition switch and the light and the aux. pump are still running?

yes

 

[DrX]

removed yesterday to take out the ignition switch connector

same problem

You removed the instrument cluster yesterday? That's why I posted the video.

There are a few tests you can do on it to see if it's OK. Do you have a multimeter?

 

[43sqd]

You removed the instrument cluster yesterday? That's why I posted the video.

There are a few tests you can do on it to see if it's OK. Do you have a multimeter?

Drx, to save the OP time, it cannot be a problem with the instrument cluster because the aux. coolant pump remains running and the IC has nothing to do with its operation.

After all he has done it now appears that he either has fused wires inside the fuse/relay box and if there isn't he has a problem with the AAM.

 

[DrX]

I thought he might have a CAN bus disruption, in which case anything could go. Anyway, you didn't respond to his last post for an hour, and he's not going anywhere, so it's a fair suggestion of something he could check while you're asleep/busy. That's what the Diagnostic Manual says to check next.

 

[scampirent]

You removed the instrument cluster yesterday? That's why I posted the video.

There are a few tests you can do on it to see if it's OK. Do you have a multimeter?

yes I remove.
yes I have multimeter and all data schematics I try to find some logic cause.

I dont understand this problem.

 

[scampirent]

Drx, to save the OP time, it cannot be a problem with the instrument cluster because the aux. coolant pump remains running and the IC has nothing to do with its operation.

After all he has done it now appears that he either has fused wires inside the fuse/relay box and if there isn't he has a problem with the AAM.

surely no instrument cluster problem

I try to change the fuse box monday

 

[DrX]

The diagnostic manual says that if the warning lamps display malfunction of several systems simultaneously, "it is almost always evidence of a faulty CAN Bus." (p 13/2)

This reduces possible causes (in order of likelihood) to CAN Bus short circuit to ground, CAN Bus open circuit, faulty instrument cluster (short circuit between pins 9 & 10 of connector "B"), and faulty ME-SFI module (which according to 43sqd, never happens).

 

[Noodles]

The actual ME-SFI module is one thing I have never seen go bad on a W163 unless flood/water damage occurred.
I am not saying they can't go bad. It is just extremely rare. I wish I had more to offer so
the OP can fix this problem.