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Programming Gear Shifter/Selector

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56K views 25 replies 9 participants last post by  Frank park  
#1 ·
So my father has a 2001 s500 that is no longer turning over, key still turns and the instrument cluster comes online. It just won't attempt to start the car. This happened after we took apart his gear selector to remove the broken plastic Park lock out. When we put it all together, the car drove however it would not change gears and on the instrument cluster's gear display it was flashing what gear it was in. We parked the car and figured the selector module was going bad and later we discovered that the car would no longer start.

So I would like to get a used gear selector and install it, I know that the part would need to be "married" but I am wondering if that is something I can do my self if I get a Star C4 diagnostic system. Does anyone have information regarding whether this is possible or not?
 
#2 ·
Hi,

Welcome to the Forum :)

In a word no !!

The shifter unit would need to be Brand New (or used but virginised first, but I'm told that is a very dodgy procedure success wise).

It may then also require the use of a "Green" (or whatever) coloured "Workshop Key" that is very difficult to prise from MB, and used in conjunction with the SDS Machine.

I would suggest at first that you get the Car on an SDS Machine and look at Fault Codes and Actual Values, both in ESM and TCU .........................

It is possible that the Shifter linkage is just out of synch with the Micro switch inside the Gearbox, also make sure you havn't bent a pin plugging it back in, and if you have be extreeeeeeemly careful straigtening it and subsequently plugging it back in !! ....................

Also if you are really lucky it could just be that if the ignition got turned on without the Shifter plugged in (for example), that a Fault Code has set in the TCU and will require the SDS to reset it before peace and tranquillity returns ;)

HTH,

Cheers Dave
 
#4 ·
True, but OP asked if he could program a used Shifter on to Theft Relevant System just with SDS (C4), hence my answer ;)
 
#5 ·
Thank for the reply Dave2302!

So I think I would like to get a SDS machine, looking at the one on aliexpress that has been posted in this thread https://www.benzworld.org/forums/r129-sl-class/2315329-got-my-mb-star-c4-diagnostic.html

That should help out with any faulty codes from the TCU or any other component.

You mentioned that it may be out of sync with the microswitch in the gearbox, what would be the best way to determine and/or fix this?
 
#7 ·
This is whole new can of worms, and success is predicated on too many considerations

there are several variations in the SDS,
C3, C4.
Offline coding / Online coding
Developer mode .
and then version of different SDS work only with some laptops / Car models.
Once you got all that sorted, then you will need to learn how to get it done.

Unless you have done all research, I would suggest to engage someone who already does this for a living and get your car rolling.
 
#6 ·
Hi,

Live Data on SDS, micro switch in Tranny should be allowing Start in P or N ;)
If not right it probably means simply adjusting selector shaft to shifter rod

HTH,

Cheers Dave
 
#8 ·
Hi,

Quote:- there are several variations in the SDS,
C3, C4.
Offline coding / Online coding
Developer mode .
and then version of different SDS work only with some laptops / Car models.


/\ /\ /\ sort of, but needs to be clarified to dispel a few urban myths :wink ..................

C3 will work on W220, and up to around 2014 model Year Cars, if you want to work on post 2014 Cars one day, get C4

All SDS do Version Coding ..................... offline / online is a bad translation and refers to SCN Coding, (later models from 7G tronic Transmission "years" upwards) and Reflashing ECU Updates. Most DIY'ers will never use it. Offline flashing finished in 7 / 2012, but the database of flash files for up to 7 / 2012 can be added to the S/W by someone who knows what they are doing with S/W ;)

Developer Mode can be useful, not essential for DIY, but most now have it at no extra cost, read the small print.

DIY are best advised to use Dell D620/630 or D820/830, especially with C3 as it needs Native Serial Port, nowadays C4 uses LAN and Wireless, so can use Panasonic Touch Screen etc etc as Native Serial no longer required!!

HTH,

Cheers Dave
 
#9 ·
So I ended up getting a the C3 mux with 2017.03 software. Set it up with a Dell D630 and it seems to be working great!

Ran a Quick Test in DAS and got a ton of codes, many "F" and "f"'s. It listed the EGS as not being read at all, so I fidgeted with the connector on the shifter and alas the vehicle started up. I did another quick test and found that the EGS is reading just fine, I check the live data and saw it was detecting gear changes. However the gear selection is still not showing on the instrument cluster, neither is "W" or "S"

The ETC however is showing a "F" with a "p2300 CAN communication with other control units installed in this vehicle is not possible. ( Bus OFF fault )"

Below is the live data, note Target and Actual Gear read as Implausible

Image


So I checked the TCM (Under hood - battery box - passenger side) and did not find evidence of Trans fluid, also this was recently replaced by the dealer (2 years ago)

Sort of stumped, did the TCM go bad again? Center Console is still disassembled however everything is plugged back in except Bose Fiber connections

Attached are some other faults
 

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#10 ·
Hi,

Congratulations on your purchase and well done for getting this far, this machine will save you a mint on your Car repairs :grin

Nowhere in your above post can I see "I cleared, (Eraser Icon), the Codes after (delete as applicable) I wrote them down / I printed them out / I saved them" ;)

You will find certain faults that get stored in ECT / TCM will need erasing before it will work correctly again.
The Code that is stored is a Communication Error between EGS and ECT / TCM so you appear to have fixed that :wink

Clear out the TCM / ETC and that will fix that.

Looking at the Front Left Speed Sensor (current) and Airmatic Strut (stored) problems I'd say that the Wiring Plug on the Inner Wing has been unplugged at some point and not re plugged correctly / bad connection, or Bad LF Sensor ;)

Do not worry about "Steering Angle Sensor" Code, start Engine and turn Steering Full Lock to Full Lock a few times and that will go away ;)

HTH,

Cheers Dave
 
#11 ·
Thank you! My Dad is quite attached to this car so I am sure the SDS will pay for it self over time.

I did save a "Print to file" (No idea where it saved though) of the QuickTest report and then proceeded to "clear" all the codes. The images I posted were taken after the clearing and a rescan.

I will have a chance to clear all the codes again this evening and will report back regarding my findings.

Once again thank you for the information so far! :smile
 
#12 ·
Alright so I was able to run another Quick Scan of the car and I have attached a report below. I cleared all the codes before this scan, both methods, all at once and individually module by module.

Looks like some of the previous codes are still current, :frown

ETC, ME-SFI, and AIRmatic all seem to be upset about "CAN communication"

The Instrument Display section that shows gear selection is still blank (PRND & WS), AIRmatic - C1027-008 mentions CAN communication fault with N15/3 (ETC [EGS])

I also inspected the connections in the Left front wheel well and saw no unplugged connectors. Is there anything to inspect under the hood for that corner?
 

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#17 ·
I could not access my diagrams as the site was under maintenance. It appears that the 3 pin connector is for keyless-go module (N69/5). So if you do not have keyless-go, there should be no connection. The CAN bus connections are from pins 6 and 7. I wonder when you tried to repair the shifter, some electronics got damaged / loose connector / bad wiring...

Flashing gear indicator possibly is due to gear selector is not updating the selected gear over the CAN bus, or sending implausible data (junk).
 
#18 ·
So maybe there is a issue with the connectors, I inspected the 8 pin gear selector connector to find that two wires (Pin 2 & 3) are slightly stripped. It does not look like the connection has been severed so I tried placing small pieces of tape between them however the issues persist. I will check for continuity with my meter between the connector's pin-in and the stripped section. Attached is a photo of the connector.

mrboca, you mentioned earlier that my SDS report indicates an issue with EGS (Transmission) module's CANBUS and that my shifter is the ESM module (which SDS reports it fine). Should there be another module that I should look at instead of gear shifter?

Thank you for your help so far!
 

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#19 ·
The stripped wires are the diagnosis and the mode select (W/S) switch inputs which seem to be fine as you can access the ESM via SDS. The green and green/white wires are the CANbus lines which seems intact.

The EGS reports a fault P2300 (bus off) because it tries to send data ove the CAN busses (low and high) but the busses are busy for some reason, so it cannot transmit data. It puts the transmit data into an output buffer and if the data cannot be sent, it overflows, so the EGS turns the bus connection off. Usually it reset itself and restart to see if it clears.

You need to backtrack and check the history of events.. Was the transmission shifting fine prior to the park lock piece you replaced ? Have you had any problems with the transmission or any other system before ? If the transmission was OK prior to shifter removal, repair and re-installation, one would think the problem would be localized to the shifter.

Maybe you can pull the shifter connection out (or pull fuse 1 in the right fuse box for the shifter), then run the SDS with hey in position 2. Clear the code from the EGS and check if comes back.

You do not have keyless go (KG) feature, do you ? I can see that when you have KG, then there is special electronics which will handle the theft deterrence (authorization), but I am not sure a shifter with no KG is a theft relevant part. I believe they have different part numbers. The one with the KG has a KG attached at the end.
 
#21 ·
Have you checked very carefully to make sure you haven't bent a pin when you plugged the shifter in, I always plug them in before I bolt them down as they are hard to align correctly and push the plug in when fixed down !!
 
#22 ·
Sorry to revive an old thread !!
But I've just fixed a similar long standing intermittent fault on my SL55 with very similar ESM to these.

I was getting intermittent display of Reverse when it was in fact in PARK.

This triggers fault codes in the ESM and TCU and sometimes EIS key module.
Usually P1925 Drive authorization denied N15/5.

My ESM PCB was bad so I installed a used ESM from USA. ÂŁ140

As I only have a LAUNCH 431 OBD scanner which is great but doesn't programme stuff like the Star can but it communicates with all modules and will clear the fault codes.

I had to swap the 8 pin EEPROM over (ATMEL 93C56) from my faulty PCB over to the used one to retain the original coding.
(not a job for the faint hearted !!!)

At first Drive Authorization was still being refused N15/5 and Gear display on dash would come and go

What I discovered was the DTC codes have to be cleared in all 3 modules ESM TCU and sometimes EIS for the module to come back online once more.

Also I hadn't bolted the ESM down fully while testing it, so the tolerances were out with the gearbox linkage rod (must be quite critical)

As soon as faults cleared again engine fired up and all gears resumed.

It seems if everything isn't perfect with this module the car thinks it's being stolen so throws the P1925 code which inhibits cranking of the engine and sometimes inhibits comms to the dash to display the gear mode.

So basically if you can't virginalise a used ESM I can confirm it is possible to swap the EEPROM over which saves having to code it all in to your VIN :)

Jules
 
#23 ·
2662115

Sorry for continuing to revive this old thread
I also have the P1925 Drive authorization denied N15/5, and B1016 no enable from control module EWM electronic selector lever module, I have replacement (used good shifter) so I need to replace chip - which chip needs to be replaced - this is Picture of the board in the shifter.