C300 Hybrid not starting after collision

[JohnnyBoy1]

Recently purchased a 2015 C300 Diesel Hybrid from an auction.

It had a very minor accident to the car only cracking the front bumper (no airbags or crash sensors were deployed). However the car will not start up.
The battery in the boot was disconnected when I got the car, I connected it back up and I am getting an error 'Malfunction' with a red battery sign (Please see picture).

The car lights up everything works as it should, the hybrid battery still has 44% remaining, but the engine is just refusing to start up.

Could it be that the battery in the boot is too low and has given up?

Any help will be much appreciated.

 

[V6Matty]

After an accident it will need to go onto online STAR to be given the all clear to start.

 

[DREAMER NO2]

And talk about owning modern cars . Simplicity for me .

 

[JohnnyBoy1]

After an accident it will need to go onto online STAR to be given the all clear to start.

When it was at auction, it was confirmed to start up and had pictures of the car running in idle.

 

[John Laidlaw]

Gearbox may have been dislodged in the collision, the hybrid motor is attached to the gearbox , if the gearbox is inop then the car/ hybrid won’t engage or start...it’s me theory anyway

 

[JohnnyBoy1]

Gearbox may have been dislodged in the collision, the hybrid motor is attached to the gearbox , if the gearbox is inop then the car/ hybrid won’t engage or start...it’s me theory anyway

It engages into neutral fine?

 

[V6Matty]

Did you see it running personally, if not then that could have been a picture from another car, wouldn’t be the first time an auction “mistakenly” included a picture it shouldn’t have.
As before I think your car will have to be placed in and online STAR to be given permission to start, likely a failsafe for the hybrid system but really STAR is going to be your only option here.

 

[JohnnyBoy1]

Did you see it running personally, if not then that could have been a picture from another car, wouldn’t be the first time an auction “mistakenly” included a picture it shouldn’t have.
As before I think your car will have to be placed in and online STAR to be given permission to start, likely a failsafe for the hybrid system but really STAR is going to be your only option here.

I will give online STAR a try and will update the outcome.
Thanks alot

 

[Mike Smith]

If it was last serviced by a Mercedes dealer then use the call button on the overhead console to call out mobilio

 

[John Laidlaw]

Going back to your boot (consumer- stop/start battery), have you checked its voltage? If it’s the original from 2015 it’s probably goosed. Worth replacing to begin as you’ll have to anyway . Might be a simple fix (I’m a bit doubtful though)

 

[JohnnyBoy1]

Going back to your boot (consumer- stop/start battery), have you checked its voltage? If it’s the original from 2015 it’s probably goosed. Worth replacing to begin as you’ll have to anyway . Might be a simple fix (I’m a bit doubtful though)

I've got somebody coming tonight with a booster, failing that will get a new battery. Last resort is using online STAR.

 

[Tony Dyson]

Be very careful with "Boosters/Jump starters" check the operating voltages of the various device settings will not apply any voltages to your car exceeding 14.8v!! Applied voltages in excess of 15v will start to fry your car's sensitive electronic components.

 

[alexanderfoti]

I would recomend getting it to an indy to diagonse a no start condition, rather than trying to find "online star" services if that makes sense?

It wont be a case of plug in and press "enable", it will require some amount of diag. I echo the others though, check the boot battery is not flat and take if from there.

Does the car move under hybrid power at all? If not, then it may be missing start auth for one reason or another (maybe crash interlock, maybe a fault)

 

[Mike Smith]

This may help, bear in mind this is on a left hand drive so the fuse box will be on the drivers side.
http://rk.mb-qr.com/en/205.21/

 

[JohnnyBoy1]

I would recomend getting it to an indy to diagonse a no start condition, rather than trying to find "online star" services if that makes sense?

It wont be a case of plug in and press "enable", it will require some amount of diag. I echo the others though, check the boot battery is not flat and take if from there.

Does the car move under hybrid power at all? If not, then it may be missing start auth for one reason or another (maybe crash interlock, maybe a fault)

It doesn't start at all, when I do try to start the car a red warning pops up telling me theres a malfunction with the battery. Then another warning sign appears in yellow with a battery sign 'please start vehicle'.

The boot battery was disconnected for 2 months I should say, as it was written off in November last year and I only got it couple of days ago.

 

[JohnnyBoy1]

This may help, bear in mind this is on a left hand drive so the fuse box will be on the drivers side.
http://rk.mb-qr.com/en/205.21/

Thank you very much bud, it turned out to be
'High-voltage disconnect device'.
The engineers put a cable tie around the plug so it does not clip back in. Took the cable tie off and pushed the plug in and car started first time.

If it wasn't for that link you provided I don't think I ever would've found out the problem.

Also thanks to everybody else for their help & advice.

 

[Mike Smith]

No problem.

 

[Mike Smith]

I also have the C300 Hybrid in 2017 guise, I love it even though the hybrid bit doesn't do much.

 

[JohnnyBoy1]

I also have the C300 Hybrid in 2017 guise, I love it even though the hybrid bit doesn't do much.

That's good to hear, wasn't too fussed whether it was hybrid or not, just picked up a good deal.
Don't know anything about these engine yet as it's my first Mercede. Previously owned Audi/VW.

 

[RDS]

@Mike Smith
That is a great link you have provided (30th Jan 2020) showing the C300 systems.
Do you have a link for the E300. Mine is a 64 plate.
Thanks