2014 ML350. No crank, no start.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
2014 ML350. No crank, no start.
89k miles and never any issues.
Parked it on the street to go into a store. Come back out and it wont crank at all. The brake booster groans and pushes back a bit when I hold the pedal to use the keyless but it refuses to engage the starter. Popped the keyless button out and used the key (key is less than a year old). Doesn't do anything past turn to positions 1 and 2. It will turn all the way to start position but still nothing happens.
Completely at my wits end.
Hooked up autel scanner and it's throwing a dozen random codes for completely unrelated things. I tried to wipe them all and start fresh. It wiped most, but not all, and still won't crank at all.
Any ideas?
Parked it on the street to go into a store. Come back out and it wont crank at all. The brake booster groans and pushes back a bit when I hold the pedal to use the keyless but it refuses to engage the starter. Popped the keyless button out and used the key (key is less than a year old). Doesn't do anything past turn to positions 1 and 2. It will turn all the way to start position but still nothing happens.
Completely at my wits end.
Hooked up autel scanner and it's throwing a dozen random codes for completely unrelated things. I tried to wipe them all and start fresh. It wiped most, but not all, and still won't crank at all.
Any ideas?
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
MBWorld Fanatic!
Joined: May 2021
Posts: 2,524
Likes: 2,041
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Codes?
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
Last edited by JCM_MB; Jan 26, 2024 at 08:39 PM.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Codes?
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
https://youtu.be/7kZ1wF-jDFU?si=h1ea3l9jp849G4z3
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
https://youtu.be/7kZ1wF-jDFU?si=h1ea3l9jp849G4z3
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Codes?
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
https://youtu.be/7kZ1wF-jDFU?si=h1ea3l9jp849G4z3
meantime,
check floor is dry on both sides, passenger and driver.
Check trunk is dry, spare tire area and both side pods
With your Autel, can you check the ESL, electronic steering lock. You want to check the status of every position if the ignition as you rotate the key.
For example,
https://youtu.be/7kZ1wF-jDFU?si=h1ea3l9jp849G4z3
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Codes are
P049800 charcoal canister
U010187 can't connect to TCM
P045800 Evap system short
P25051c voltage for ecu out of permissible range
And there are a lot of unrelated codes stored in other modules like in the ESP module (c075500 c074c00 c085100) for CAN bus errors including eis/ezs coding implausible.
Also, SAM module error code washer fluid sensor being out.
Headlamp module code
collision prevention module error, undefined
bbackup camera, parking brake, power steering, sound system. But everything is working normally and has never had fault. It just won't start.
I jumpered the starter relay lugs with the key on. The starter cranks but engine won't start.
P049800 charcoal canister
U010187 can't connect to TCM
P045800 Evap system short
P25051c voltage for ecu out of permissible range
And there are a lot of unrelated codes stored in other modules like in the ESP module (c075500 c074c00 c085100) for CAN bus errors including eis/ezs coding implausible.
Also, SAM module error code washer fluid sensor being out.
Headlamp module code
collision prevention module error, undefined
bbackup camera, parking brake, power steering, sound system. But everything is working normally and has never had fault. It just won't start.
I jumpered the starter relay lugs with the key on. The starter cranks but engine won't start.
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Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Also checked status of every turn of key and all checked as normal, including signal 50 when you try to start engine. Fuel pump getting 0 voltage and brake pump pushing back are very odd.
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MBWorld Fanatic!
Joined: May 2021
Posts: 2,524
Likes: 2,041
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Tons of errors. CAN error are important all the time. We need to know which CAN bus because the ECU also uses the CAN.
So far,
Battery seems good, and not the main problem
starter is good
ignition switch is good
Check starter relay, or if the relay is being energized when turning the key. If the control is not energized, the ECU is not commanding the relay.
The fuel pump is energized 12V for @3 sec when key is turned to prime the rail. Then, goes to 0V until crank is requested. Also, commanded by the ECU
Any water signs? Checked all fuses? Front box, under passenger seat box, passenger side dash box, passenger side under rear seat, trunk rear SAM
https://fuseandrelay.com/mercedes/166-ml-gl.html
So far,
Battery seems good, and not the main problem
starter is good
ignition switch is good
Check starter relay, or if the relay is being energized when turning the key. If the control is not energized, the ECU is not commanding the relay.
The fuel pump is energized 12V for @3 sec when key is turned to prime the rail. Then, goes to 0V until crank is requested. Also, commanded by the ECU
Any water signs? Checked all fuses? Front box, under passenger seat box, passenger side dash box, passenger side under rear seat, trunk rear SAM
https://fuseandrelay.com/mercedes/166-ml-gl.html
Last edited by JCM_MB; Jan 27, 2024 at 09:43 PM.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
No water signs anywhere, all fuses and relays are good.
I found another thread with similar codes and symptoms and it was a 150amp fuse near the positive lug under the hood. It blows if alternator is shorted or battery terminals are shorted. Headed back out to test for that today.
I found another thread with similar codes and symptoms and it was a 150amp fuse near the positive lug under the hood. It blows if alternator is shorted or battery terminals are shorted. Headed back out to test for that today.
Junior Member
Joined: Jan 2024
Posts: 63
Likes: 2
200cdi w204
Does the instrument panel change accordingly when you turn on ignition key 1 and 2? obtains ME authorization in ecu?
bypass esl crank, Hopefully it will start and you can go to the workshop or home.
Although as my colleague says, if the water is the culprit in SAM F, it is complicated, spray the inside with wd40
bypass esl crank, Hopefully it will start and you can go to the workshop or home.
Although as my colleague says, if the water is the culprit in SAM F, it is complicated, spray the inside with wd40
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Does the instrument panel change accordingly when you turn on ignition key 1 and 2? obtains ME authorization in ecu?
bypass esl crank, Hopefully it will start and you can go to the workshop or home.
Although as my colleague says, if the water is the culprit in SAM F, it is complicated, spray the inside with wd40
bypass esl crank, Hopefully it will start and you can go to the workshop or home.
Although as my colleague says, if the water is the culprit in SAM F, it is complicated, spray the inside with wd40
Went out there to find this 150amp fuse but couldn't find it. I found a 100amp that was testing fine. Maybe there are fuses inside the under-hood prefuse box?
It was an hour away in the rain, so we gave up on trying to fix it as-is. Had it towed to a respectable euro shop 20 miles away. Awaiting their diagnostic results.
MBWorld Fanatic!
Joined: May 2021
Posts: 2,524
Likes: 2,041
From: US
2008 E350, 2012 ML350, 2014 E350, 2015 ML350
Instrument cluster acts normal in positions 1 and 2, but when you turn to ignition it doesn't change. In position 2 you can even select gears and put it in Neutral/Reverse/Drive.
Went out there to find this 150amp fuse but couldn't find it. I found a 100amp that was testing fine. Maybe there are fuses inside the under-hood prefuse box?
It was an hour away in the rain, so we gave up on trying to fix it as-is. Had it towed to a respectable euro shop 20 miles away. Awaiting their diagnostic results.
Went out there to find this 150amp fuse but couldn't find it. I found a 100amp that was testing fine. Maybe there are fuses inside the under-hood prefuse box?
It was an hour away in the rain, so we gave up on trying to fix it as-is. Had it towed to a respectable euro shop 20 miles away. Awaiting their diagnostic results.
Please keep us posted on the solution.
MBWorld Fanatic!
Joined: May 2018
Posts: 6,600
Likes: 6,547
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
Possible you mini relay R is bad. Swap/borrow from mini relay O ( horn ), it is the same one.
Relay R powers the Tranny Computer , you have the code of Lost Com to tranny computer.
BTW there is a TSB on that mini relay. 2 members here have this relay went bad both are W212.
Codes are
P049800 charcoal canister
U010187 can't connect to TCM <<<<< Lost Com to tranny computer
P045800 Evap system short
P25051c voltage for ecu out of permissible range
You can do full scan first and see if your Autel can or can not see the tranny computer Y3/8 which Autel would call simply as TCM.
If there is no power to tranny computer, the Autel won't see it and no TCM on scanner will show.
Good luck.
Relay R powers the Tranny Computer , you have the code of Lost Com to tranny computer.
BTW there is a TSB on that mini relay. 2 members here have this relay went bad both are W212.
Codes are
P049800 charcoal canister
U010187 can't connect to TCM <<<<< Lost Com to tranny computer
P045800 Evap system short
P25051c voltage for ecu out of permissible range
You can do full scan first and see if your Autel can or can not see the tranny computer Y3/8 which Autel would call simply as TCM.
If there is no power to tranny computer, the Autel won't see it and no TCM on scanner will show.
Good luck.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2005
Posts: 2,418
Likes: 194
From: America
1999 C43 AMG, 2005 E55 Wagon
Possible you mini relay R is bad. Swap/borrow from mini relay O ( horn ), it is the same one.
Relay R powers the Tranny Computer , you have the code of Lost Com to tranny computer.
BTW there is a TSB on that mini relay. 2 members here have this relay went bad both are W212.
Codes are
P049800 charcoal canister
U010187 can't connect to TCM <<<<< Lost Com to tranny computer
P045800 Evap system short
P25051c voltage for ecu out of permissible range
You can do full scan first and see if your Autel can or can not see the tranny computer Y3/8 which Autel would call simply as TCM.
If there is no power to tranny computer, the Autel won't see it and no TCM on scanner will show.
Good luck.
Relay R powers the Tranny Computer , you have the code of Lost Com to tranny computer.
BTW there is a TSB on that mini relay. 2 members here have this relay went bad both are W212.
Codes are
P049800 charcoal canister
U010187 can't connect to TCM <<<<< Lost Com to tranny computer
P045800 Evap system short
P25051c voltage for ecu out of permissible range
You can do full scan first and see if your Autel can or can not see the tranny computer Y3/8 which Autel would call simply as TCM.
If there is no power to tranny computer, the Autel won't see it and no TCM on scanner will show.
Good luck.
Newbie
Joined: Jan 2026
Posts: 12
Likes: 0
89k miles and never any issues.
Parked it on the street to go into a store. Come back out and it wont crank at all. The brake booster groans and pushes back a bit when I hold the pedal to use the keyless but it refuses to engage the starter. Popped the keyless button out and used the key (key is less than a year old). Doesn't do anything past turn to positions 1 and 2. It will turn all the way to start position but still nothing happens.
Completely at my wits end.
Hooked up autel scanner and it's throwing a dozen random codes for completely unrelated things. I tried to wipe them all and start fresh. It wiped most, but not all, and still won't crank at all.
Any ideas?
Parked it on the street to go into a store. Come back out and it wont crank at all. The brake booster groans and pushes back a bit when I hold the pedal to use the keyless but it refuses to engage the starter. Popped the keyless button out and used the key (key is less than a year old). Doesn't do anything past turn to positions 1 and 2. It will turn all the way to start position but still nothing happens.
Completely at my wits end.
Hooked up autel scanner and it's throwing a dozen random codes for completely unrelated things. I tried to wipe them all and start fresh. It wiped most, but not all, and still won't crank at all.
Any ideas?
can you please tell me what was it , how you fix it ? I have the same problem cannot fix it please
Newbie
Joined: Jan 2026
Posts: 3
Likes: 2
2013 ML-350
When so many unrelated modules are involved, check all ground points for any voltage drop from battery ground. Also make sure main and auxiliary batteries are fully charged prior to testing.if not a ground issue, usually voltage instability can cause communication issues with many modules. Usually corrosion, broken power connection or insufficient battery capacity.
