Engine won't start (sometimes)
 

happened twice now (since i got it the 9th of august)
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.

same thing happens to me!!! :(

I have this problem also. About six times so far, and I've had the car for 13 months now. It always starts once I turn it all the way and try it again, and because it is so rearly, it doesnt really bothers me.

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.

yea same thing here.. this happens to me almost once a week.

The car
 

is on warranty,have the dealer plug in the diagnostics and run the ignition program.It will generate the whole sequence and duplicate what is going on.Either the das is not accepting the code or the ignition is failing to accept the code on the first try.
:bow:
get it fixed,why wait till it fails or is off warranty just because it really does not bother you now?:)

Have you switched to your 2nd key, have all these failed attempts been on the same key?

I found that, when you turn the key, you need to hold there a little until it starts before you release the key (like what you do on old cars).

it's at the garage now.. will see this afternoon.
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!

Same thing happens with mine and I too found that holding it to start a second longer eliminates it.

ok i got her back.

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)

Can you look at your invoice sheet and see what parts (parts #) were replaced?

Interesting to know what was done.

you know what works for me?

DONT TURN THE KEY SO FASSSST lol ....

had to say it. :rolf:

I dont think its a problem. Ive noticed that compared to other MB's that Ive driven, you have to hold the key for a little longer for it to "start" starting. Sometimes I dont hold it long enough and then you have to turn it off and turn it back on again for it to start. I hold it for about 1-1.5 seconds then let the touch start take over. In our ML and E, it starts immediately, theres no delay like the C.

they didn't give me an invoice as it's under guarantee
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.

well, it happened again last night:

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)

I just wondered whether you have an auto ? . Your problem could be an interlock issue? I know an auto has to be in P or N to start & the brake applied to shift into drive.Just a thought.

You need to let the key register with eis. When you turn to fast car will not start up...

i already expalained in my previous post, that i do NOT turn the key too fast...

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

Okay, so after reading this post all the way through, I wanted to say that I had a similar problem with my '09 C300. I tried both keys and nothing! Called the emergency 800 # and they told me it needed to be towed. So, after getting the car back it seems that they had to replace the "Crank Shaft Sensor". Apparently it was bent or misaligned. So, if this helps anyone let me know. I can get a part number that they replaced too if needed.

Interlocks are mechanical or electrical methods of controlling the sequence of an operation. ie a condition or conditions have to be satisfied before the operation can move on to the next step in the sequence eg gearbox in neutral or park before starter motor will turn., brake pedal pushed before shifting into drive.

I'm having this same problem with none of my keys working, lights & dash still come on but the radio, windows or nothing else works. The car is not doing anything, it's not making any sound when I try to start it or it won't even go into any gears so when I had to get it towed, it was a ugly site watching them shake it off the flatbed because it wouldn't go into neutral. I don't know what's wrong but I'm taking it to the dealer first thing in the morning. Your post was the only one that gave me some insight on what COULD be wrong. Thank you

The manual release for the shifter is under the shifter boot. It pries out for access. The tow truck schlub should have known this if the dealer sent him.

Cranksensor & EIS
 

I had the following two starting issues:

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.

The dealer didn't send him. They said they don't have courtesy towing which I am very upset & disappointed with them about. The tow truck guy said something about most cars having that but not Mercedes or BMW cars. Something about not wanting easy access for thieves. I'm waiting on a tow to the dealer now.

Newbie

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