skill a pure

hey guys, drove the mercedes one day, i went to work, went home, then when i tried to start the car a bit later, it just didnt start...

i have read a thread on practically exactly the same thing, but i the only thing that is different is that this guys car cranks, but mine doesnt crank...

im not sure if its the feul pump? or the cps?

here is the thread on the similar problem... let me know please

http://www.benzworld.org/forums/w203...-wtf-need.html

skill a pure

i looked at a different thread, and the same problem happened. but the different thing is that my ignition doesnt crank...

i mean the car war driven to work, then back home, then when tried to start... it just wouldnt start... this happened before, i just really want to get rid of the problem this time

this other thread, the link below has the description which is the same, the only difference is that my car doesnt crank.
i dont know if his didnt crank later on or not? but i cannot get a hold of him through messagin. please can someone help me out here?
if i dont sum up my problem... read the thread link below just to get a better idea... thank you!

https://mbworld.org/forums/c-class-w...here-look.html

edgarinho10

Make sure the shifter is in Park?

e1000

Is there a CEL? If so that's what you should check first.

johnand

Check fuse 52 in the front SAM to see if it is blown. If so replace it with a 20A fuse. The TSB on this is posted in the Technical Information Thread.

Glyn M Ruck

Check Fuses 31, 52 & 57. If 52 has blown replace with 20 amp as per MB TSM in Techinfo section of stickies.

OneOfaKindTrini

Where you located?

Glyn M Ruck

Sorry for my duplicate post. John's did not show on my screen.

johnand

Sorry Glyn, I merged the threads, as the OP made 2 separate threads for the same thing.

Glyn M Ruck

Understood!

Outkasted24

Same thing happens to me sometimes.
I believe the problem is in the Key.
If The car won't start, I take the key out and wipe my finger over the sensor at the end of the key and the ignition, Put the key back in, Turn it.... and Presto.
It's either that the key is dirty or maybe the battery is slowly going in the key itself.

LILBENZ230

The battery in the key isn't even necessary to start the car. It's something else with your car.

Outkasted24

well the reason I say that, Sometimes I can't even get the car to unlock unless I'm two feet away or press the fob buttons multiple times for it to work.
Doesn't the chip inside the FOB need a source of power to transmit the signal?

Glyn M Ruck

The key requires a good battery for RF to work at a distance & IR to work close to the handle window.

Once the key is inserted in the EIS it is inductively powered to achieve handshake & authorise start.

niceguyftx

Did you ever fix this? Do you know why it happens? This happened to me last night

And OP I wonder if he figured out the problem too. I just replaced the fuse 52 with a 20 so we'll see if it continues to act up

LILBENZ230

If you're too quick sometimes it won't start.. I've had that happen to me. It's very rare. If it just happened once then I wouldn't worry too much about it.

niceguyftx

Ok so I tried starting my car this afternoon and it still doing the same thing even after changing the fuse. Few tries later and it starts...so now check the cps?

Glyn M Ruck

The CPS will not make any difference if it won't crank over. Does it crank over?

niceguyftx

Um no crank. Just electronics turn on :/

pcy

If I were you, I 'd check ground connections (at the battery as well as at the starter).
Then, I'd look at the ignition switch itself.

Glyn M Ruck

If you have done fuse 52 then check the starter relay & earths/grounds. Try & jump start straight onto the starter motor to make sure the kick-in solenoid & motor are operative. There are some fusible links but they can't be erratic - It either works or it's blown.

Pray it's not an EIS.

niceguyftx

so I decided to open my keys and see if that could be the problem too. Still not sure if it is, but i did see on the board where the secondary coil is, that there were gaps in the coils and I don't know if t hats the problem with the start? you electric experts would probably know.

I also just ordered the relay so I'll be able to determine if that's the culprit or not.

Glyn M Ruck

Show us a pic of the key internals. Moviela has a post on the forum that shows where the induction coil can come loose from the PC board.

niceguyftx

KEY #1



KEY #1 Reverse side



KEY #2


KEY #2 reverse side

See the second key on the coil, there's some separation? Well turns out it's not the problem, because I finally tried my second key and even today my key would sometime not start the car.

I REALLY hope it's not the EIS! But would the EIS still not work if it recognizes the key?? =(((

niceguyftx

more and more this problem persists =[

I just replaced the starter hoping my car would start normally each time but it still continues. It's actually gotten worse. Sometimes it'll take about 30 tries or so for the car to crank and turn on. I just ordered the CPS sensor though just as a last resort attempt at fixing this before sending the car off to a mechanic to diagnose.

if anyone has any suggestions on any other methods or fixes I could try, please help. thanks!