Engine won't start (sometimes)




i turn the key, all lights go on but engine won't start.
I turn the key all the way back, then try again and it works...
anyone else had this?
have to go to the garage tomorrow to change a piece which controls
the tightening of seatbelts in case of an impact
(was broken since day 2 & piece now finally arrived),
so would be great to have some info on this new problem before i go in....
thanks.
I read a post a while ago about someone who had to call for a tow truck because of this, so if it gets worst I would defenetly have the dealer check it. It's been like three months since it last happened to me.

get it fixed,why wait till it fails or is off warranty just because it really does not bother you now?
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even if it doesn't happen often (and it does start on the 2nd atempt)
it's not acceptable for a mercedes...or any other new car for that matter!
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they say it's repaired, although the guy i spoke to, did not know
what exactly has been done.
but it had to do with the "anti-theft blockage system"
(sorry have no idea what mercedes calls it in english)
Interesting to know what was done.




and also "officially" i'm not the owner (the lease co is)
but they did not replace any part as far as i understood
(though my french is not 100pct perfect, so sometimes i miss things...)
I should have asked him for some more details. sorry about that.




as usual i turned the key to 2nd position,
waited till the pre-heating light went off (i have a diesel),
turned the key all the way & kept it there,
nothing happened.
had to turn they key all the way back again & di it again
so i wonder what the garage DID repair...?
with this & the windnoise (which they said they'd taken care off.. not) i am not very happy!
Didn't expect to find these 'little' problems with an MB
I really don't have time to make all these trips to the garage.... (insert smiley face not smiling here)
as usual i turned the key to 2nd position,
waited till the pre-heating light went off (i have a diesel),
turned the key all the way & kept it there,
nothing happened.
had to turn they key all the way back again & di it again
so i wonder what the garage DID repair...?
with this & the windnoise (which they said they'd taken care off.. not) i am not very happy!
Didn't expect to find these 'little' problems with an MB
I really don't have time to make all these trips to the garage.... (insert smiley face not smiling here)




Carsy: yes it's an Auto. what do you mean exactly by interlock problem?
plsd to hear




1-The engine cranks, but do not start untill key is pulled out and put back in, then it starts, happened a couple of times during 1st 20 000Km.
It was the crank sensor-Replaced =One day.(Ther was a notification to replace crank sensors)
2-Sudden death after parking. No indication of a problem coming.
The one moment it works, 10 minutes later not.
Symtoms=No whirr sound when key is inserted(Both keys)
Switch on, lights etc, doors lock, but no cranking/starting, just dead.
It was the EIS-Replaced=Two weeks(There was a notification to replace EIS)
>The new EIS whirr sound is fast and fresh, the old EIS sounded slower when it still worked.
Join Date: Jan 2016
Posts: 3
Drives: C350 amg
Hello
I m new to this
I have 2012 c350
From past 2-3 days wheb i cold start my car with the push to start the engine would crank for a split second and stops. I have to wait few seconds and push the button second time to start the car.
Do ineed a new battery ? Or is it the starter ? Or something to do with the engine and crankshaft ?
Thanks


