thegrid52

I have a 2010 c300 and I just changed my Eis and got a new key when I insert the key the steering lock unlocks but the car won’t crank the battery in the car was flat because it was sitting for a year and a half I used a small jump box all lights turned on except the radio didn’t work or the windows I’m wondering if the car didn’t have enough power or if it could be something else can someone please help me??

JettaRed

iTrader: (1)

1. Don't use a jump box.
2. Get a new battery.

cvx5832

3) use sentences

thegrid52

Please don’t reply with dumb stuff like use sentences

JettaRed

iTrader: (1)

It's not dumb. It's harder to understand your problem without punctuation. If you want help, you need to make it easy for people to understand what you are trying to communicate. I had to read your word-stream several times. Even now, I'm seeing something I missed before. If you make it hard for people to understand what you are writing, they will likely skip your posting.

When you replaced the EIS module, did you have it coded to the car? If not, the car won't start.

thegrid52

Yes Eis and key was programmed

JettaRed

iTrader: (1)

Not the key, the EIS module. Who replaced the module?

thegrid52

I had the work done by a Mercedes dealer

JettaRed

iTrader: (1)

Then why are you coming here? A Mercedes dealer wouldn't return a non-working vehicle after a repair they made. If it doesn't start, how did you leave the dealership? Why did you leave the dealership? Have you scanned for codes?

Sorry, but none of this makes sense. You're going to have to provide some more info.

thegrid52

the guy works for Mercedes and made me a key and cloned my Eis but my question is does anyone have information on why my car won’t start if the ignition lock unlocks when I put the key in but no crank or cluster light?

thegrid52

Okay will do car set for a year and a half so I’m hoping it’s the battery at this point

JettaRed

iTrader: (1)

OK, so this wasn't a Mercedes dealer, but a Mercedes mechanic doing some side work. So not an official job. There's a good chance that the replacement EIS (new or used?), even though cloned, my not be registered in the Mercedes database. I personally don't know if that is a thing, but @crconsulting could probably tell us.

Why did you replace the EIS in the first place?

JettaRed

iTrader: (1)

So, assuming everything else is legit, you could have a bad starter motor. Not turning over when everything else seems OK is a classic symptom of a starter motor gone bad. Hell, if the car sat for a year and a half, rodents could have built nests and chewed through wires.

thegrid52

the new Eis unlocks my steering lock so it registers but I changed it because the car would not start

thegrid52

Yea not the case it was stored somewhere safe

JettaRed

iTrader: (1)

1. Are you talking EIS or ESL?
2. Was the part new or used?
3. Have you scanned with a MERCEDES-specific scanner?
4. What are the codes?

TimC300

I would test the battery, after not being used for 1.5yrs its probably bad. Either a battery tester or use a multimeter to check the battery voltage.

You can probably turn the key because it uses very low voltage to unlock it. Depending on the jump starter it may not be enough either. ive used a jump starter box fine for a week while I tracked down a new battery, just be sure to use the jump start points under the hood and not connected directly to the battery.

thegrid52

I’m going to get a new battery today and I’ll give that a try I’m just wondering why my steering lock unlocks when I insert the key but nothing else happens clearly the car reads the key but no crank or nothing just trying to see what could be the problem it seems like a power issue

gamma300C

Might as well jump in..when the battery is low (as in 11.5-8 V or lower the ESL can "whirr" on key insertion but turning to ON or START, besides not starting, will throw ABS/ESP and sometimes a whole other array of cluster error lights. The little "made in China" ESL motor is marketed as 12 V as it should but I've made them work with 9 volts.