Calling all DAS C3 Experts please

[richard]

If you coded the CGW, you probably turned off something that was important - something that makes the car think it has not got some control module or relay that it needs. CGW holds lots of config info that other modules use to control their behaviour.

Some guessing here, but you could have somehow turned off one of the circuit 15 relays so no ignition power being sent to the OBD2 port (pin 8) and the electric seats (if I remember right, electric seats have ignition switched power feed, memory seats have permanent as they are on CAN network, so as you have memory seats this may be a red herring, but if U turned off memory seats maybe they stop working)

Your next step is to screen capture all the settings in the CGW before you try changing anything else ... I assume it is undriveable at the moment ?

R

Ive spent 2 mins more on this. The seat controllers on cars with memory also have an ignition feed which comes from rear SAM, which has a relay (relay A) which is controlled from front SAM from the engine controller depending on the engine. Check the relay is clicking when someone else turns on / off the ignition. If its not (which is what I expect) you need to work out why !

 

[SL03WLY]

Ive spent 2 mins more on this. The seat controllers on cars with memory also have an ignition feed which comes from rear SAM, which has a relay (relay A) which is controlled from front SAM from the engine controller depending on the engine. Check the relay is clicking when someone else turns on / off the ignition. If its not (which is what I expect) you need to work out why !

Thanks Richard, will take a look. The car does run and drive well no other issues of malfuctions. When I move any of the seat buttons it does show in the live tests from Off to On etc. The Ignition error was there from the beginning where I first did the quick test before anything else. Which for some reason works when I remove the OBD2 and reconnect it, then the quick test works so is really strange.

Also yes I did go into the CGW dev mode in german but only changed 2 of the settings there to enable distronic. I was following instructions on Distronic - W220 S-Class Encyclopedia

In summary:

• Control unit groups
• Body
• CGW – Central gateway
• Clear any faults or events stored in memory
• Development data
• Main menu of control module ZGW
• Control unit adaptations
• Read coding and/or transfer download data to a new control unit
• Coding has been read
• Switch off ignition
• Switch on ignition
• Replace the old control unit with the new control unit
• NO F4
• Control unit adaptations (Variant coding)
• Globale Variantencodierung [Global variant coding]
  
  • Abstandsregeltempomat [Adaptive cruise control]
    
    • Change nicht vorhanden [not available] to vorhanden [available]
  • CAN-C: Abstandsassistent [CAN-C: Distance Assistant]
    
    • Change nicht vorhanden [not available] to vorhanden [available]
• Is the coding to be transferred to the control unit?
• YES F3
• The coding has been carried out.
• Back out gracefully

 

[alexanderfoti]

A slightly longer fix would be to do a software update using a legit DAS system, which will sort the coding out too.

 

[Diesel Benz]

A slightly longer fix would be to do a software update using a legit DAS system, which will sort the coding out too.

That would work if Distronic was first added to the vehicle datacard. Does Mercedes still support that for a W211?

 

[alexanderfoti]

That would work if Distronic was first added to the vehicle datacard. Does Mercedes still support that for a W211?

I was thinking so Op could get their seats working, but yes that will also work via Vedoc update. Should still work on a w211

 

[SL03WLY]

That would work if Distronic was first added to the vehicle datacard. Does Mercedes still support that for a W211?

Thats correct, so Mercedes no longer update the SCN cards now for W211. Have been trying for over a year. Been told only way is via offline programming so got hold of this C3 kit to do this but unfortunately led to other mishaps

 

[SL03WLY]

Hi,

So have made some progress. It was indeed a faulty multiplexer and cable so was given another one which works fine. It picks up ignition signal now. Issue I have now is the seats, when I go into the driver or passenger seat modules, it reads it and shows actual values but when I go to actuations or initialise, it shows a communication error 8.600.0 when I attempt to move the seat using F3 or F4.

The fuses are still intact in the Driver Side SAM. Would this error possibly relate to a faulty module? as issue I have now is I cannot get the seat out as its right back so covering rear bolts. Was hoping if someone possibly knows a way to power the motor manually by bypassing the modules and adding power to the wires directly instead?

 

[DSM10000]

Hi,

So have made some progress. It was indeed a faulty multiplexer and cable so was given another one which works fine. It picks up ignition signal now. Issue I have now is the seats, when I go into the driver or passenger seat modules, it reads it and shows actual values but when I go to actuations or initialise, it shows a communication error 8.600.0 when I attempt to move the seat using F3 or F4.

The fuses are still intact in the Driver Side SAM. Would this error possibly relate to a faulty module? as issue I have now is I cannot get the seat out as its right back so covering rear bolts. Was hoping if someone possibly knows a way to power the motor manually by bypassing the modules and adding power to the wires directly instead?

A 12 V battery and wires?

 

[SL03WLY]

A 12 V battery and wires?

Yes thats the route I planned to take. Pulled up WIS etc to find which one, problem is getting to it. Will keep at it see what I can get to

 

[DSM10000]

Yes thats the route I planned to take. Pulled up WIS etc to find which one, problem is getting to it. Will keep at it see what I can get to

Good luck

 

[richard]

Check there is power on the power feeds to the seat (at the seat connector) - you'l need to look up the circuit diagrams - check for the permanent power and for the ignition switched power circuit

R

 

[SL03WLY]

Thanks, yes got it to hand. Problem is the seat is far back but also too low so can't even get my hand underneat. The only motor I have access to is I believe to be the seat angle motor when you take the rear cover off of the seat. So will have to be a bit creative or just throw in the towel.

 

[richard]

I’m pretty sure you have no power on the ignition feed to both seats. Check it at the rear SAM end as you have the circuit diagrams you can see colour etc

 

[SL03WLY]

So an update.

Changed all relays are rear and front SAM. No change or differences. So went the manual power route. Bought a power probe and probe pins. Had to destroy the seat base plastic trim as the motor to lift the car is on the sides. Got it working (Thank God), it lifted right up and was able to reach underneath and get the plug that leads to the for/aft rail. Moved it enough so the 4 E12 bolts are exposed. So yeah not need to source a seat module and see how it goes from there. As fuses are fine and both the front seats and steering wheel don't move. So is my suspicion.

Thanks all for your patience and help on this one.

 

[SL03WLY]

For future reference in case anyone else faces the same. You need to power the 2 thicker gauge wires. Swap them around depending which direction you need it to move.

The thicker wires are all in pins 5 & 6

Green is for the height adjustment
Black is for forward/backwards
Brown is for seat backrest angle

I ran my fingers along the motor wires and once I felt the connector I pulled it and it came off. Unfortunately the cable ties weren’t easy to get off so left it as is



I bought the below 2 off of ebay and used an old Aux battery (full charge @ 12.8v)

Probe Pin -


Power Probe:

 

[SL03WLY]

Side motor for height adjustment