You are in Toronto right? Take it to MBhouse in North York, not the stealership.

Only take your vehicle to the stealership for recalls. Out of warranty? DIY the work or independent.

 

It is very strange though, OP did say the vehicle was operational and when parked suddenly it wouldn't start, would be strange the ECU just self-destruct all of the sudden.

 

Holy, when I see this many codes, I usually suspect battery but clearly not the case here, what about the aux battery (voltage converter?). Starter good?

 

Oh I missed forum member CaliBenzDrivers' reply on the CAN, I see, anyways OP, you are in good hands.

 

yes true! Thats why we are not going to swap modules until good luck strikes.

Here it's not only ECU ...
It's the whole CAN-C that's down!

the way to go is unplug CAN-C members until chaos stops.

Then youll know what module is raining on the party.

it could be classic water footwell swamp
(could be Tub-soaked CGW... less likely here)
Could be soaked ISM is a CAN-C VIP!
.... follow evidences.

 

Very strange it all happened super suddenly.

 

what's the normal way for XYZ to fail ?

The way things fail sometimes helps identify what caused the failure.

Here we have a chassis scan so we have clues to look after...

 

Are we going to blame Murphy now : (

 

Ol' Murphy had a stroke so instead of his wet finger now he's using parts-canon for random results

Here is an example of "NO COM, NO start" : how to question simple results to fix threshold bus plices.

 

thanks a million for the direction! Can you tell me where can-c is? I did pull the carpet on both the front and passenger side didn’t see any water residue or swamps in those areas.

I did do another rescan and individually tested using launch and I would say the majority had the “combustion engine” code which probably means the engine is on… most of them cleared away

 

hi w205c43pfl yes I’m just outside Toronto in GTA I’ll definitely look them up thanks for info!

 

@calizbenzdriver

would can-C bus be the blue and white wiring? Located in the passenger side of my car

 

you're gonna need to use chematics for colors and positions.
If you don't have Mercedes WIS access, buy a quick-cheap subscription to "ALLDATA DIY" to gain on-line access in 5mn without any delay.

Using that diagram you can know which bus-bar module you're pulling to isolate the troublemaker keep your CAN-C bus down with a short.

Now let's recap...
You dont have "carpet swamp"
your threshokds liok clean/dry
you dont have swamped F-SAM its working
but CAN-C is still down....

LOCATE **ISM** bus-bar slot: Unplug it !!!
then scan to see if CAN-C responds.

 

Disclaimer being I never been to them, I only recommend them because forum members here been recommending them: https://www.mbhouse.ca/

I am in the Ottawa area but currently out of country.

 

They were also a former vendor on mbworld, but only been an active vendor for a few months it is what it is. https://mbworld.org/forums/new-membe...-mb-world.html

 

UPDATE: So it turns out the Parking Control Unit went haywire which was unusual...essential dropped all the communication as it serves a gateway. Simply unplug and replugging it did the trick...all that time and hassle and it turns out to be 10 second fix lol

@CaliBenzDriver and @W205C43PFL thanks for all your help and guidance throughout this whole ordeal the car is up and running now!

 

GREAT News of puting this showstopper behind you.

How to keep Pkg Module from getting unstable or what was causing this ??

Now that the emergency is passed you have time to prevent next installment when you least expect it.

It would seem your chassis may benefit from REBOOT therapy.

 

I took it Mercedes Dealership who my good friend works a tech. He was well aware ahead of time and tried guiding me through the process of identifying where the issue was. I went through the whole hassle of getting it towed, and when he began working on the car…it started no problem. He even went ran it through Xentry and only one code came up faulty which was the parking module…cleared the code and bang no issues. He told me if that happened again just unplug the parking module at the back trunk in the driver seat….funny it was it had a mind of its own

 

Lucky you have a insider intel.

Also rear radar modules (inside bumper corners ) have been shown to disable engine start.

 

Congrats on finding the issue! Glad it was a no cost fix, good on you on your perseverance.

 

UPDATE: .....Unfortunately i spoke too soon! After picking up the car yesterday i went straight to a plaza (about 20 mins driving) went to grab something to eat and what do you know???? it did it again!!!! ....couldn't wouldn't start....face time my buddy asked him "what the heck?" ...he suggested unplugging the Parking Control Module at the back of the trunk area (Driver side) and try to start the car again...and it did the exact same thing (no start, fan motor running on high speed but after 2 mins goes down to low speed). Had to go through the whole process of towing again (4 hour wait)...good thing i only lived 5 mins away from the plaza (happened to bump into a friend by fluke! ) - who i haven't seen in awhile drove me home to grab some tools and including the Launch reader. went back did a diagnostic on the, showed a bunch of errors...cleared the DTCs again only this time a few errors showed up this time ( See screen shot #1) ....waited for the tow to hoist my car on dollys since a flatbed was an ideal option (unless i put skates on them)....got to the dealership and the car was put to the ground off the tow truck. Now i recall when initial tow on Sunday the car was put to the ground the next day my friend went into the car and the engine started....well i figure i would replicate what he did and start the car myself once the car was put to the ground and....what do you know the car started (WTH?) then i turned off the car and then the issue came back with no start....this is so weird! twice i've towed (which required to be lifted on dollys) and twice after putting it to the ground the car would start! It must be something to do with connection or is hitting something around the wheels areas ...not sure but its back at the dealership again!

Screen Shot #1 (codes after the initial DTC clear)


Screen Shot #2 (after my friend tested the car he figure he put it in Xentry and this code came up on the first visit):


Screenshot #3 Car started and engine on - this is after the tow put the car on the ground. (Sorry for some reason this forum won't accept my video clips) and what the dashboard showed while the engine was running - the only thing was that yellow parking lamp stayed on constant and the red parking lamp was blinking....normally it wouldn't blink in normal driving conditions.



Screenshot #4 Car turned off after the car started - screenshot of the dashboard red parking lamp still blinking:



Screenshot # 5 Car wont start and this screenshot shows the dashboard with the car in the "ON" #2 position



im puzzled? but shared that whole process with my friend to replicate the issue by using a tow machine (since the car cant go into neutral)

Any ideas @CaliBenzDriver ?

 

Uh oh, sorry to hear that, European spec vehicles have a tow away protection sensor but it shouldn't affect engine start. Yours is Canadian so North American spec. I wish I could just come to you and help you run some diagnostics but I am not in the country right now. You are in good hands though, forum member CaliBenzDriver and your dealership tech. All the best OP!

 

I see your new collection... your Mercedes is getting consistant. Car troubles are better in Summer than during Canadian Winter!

Back to square one: CAN-C gets disabled by a member module.

This time we know it's an unstable module a reboot may help.

> From your CAN-C bus-bar at foir threshold :
-- unplug the ESP module then scan chassis.
-- repeat with ISM then scan again...
> what do you see?

 

Hmmm, so this thread popped up on the forums: https://mbworld.org/forums/c-class-w...ssue-w205.html