- Mercedes-Benz C-Class: Why does My Car Dies right when it Starts?
Guide to diagnose trouble and recommended solutions
Browse all: Engine Diagnostics
2008 C300 won't start
Looks like I'm coming up on the same issue soon I'm at 68K miles. 08 c300 gonna trade in soon can't wait honestly. All these recalls and issues on these expensive *** cars
http://www.replacementmercedeskeys.co.uk/online-shop/
If you are in the UK here is a website that claims to be able to repair broken EIS modules
http://www.sinspeed.co.uk/mercedes-e...epair-service/
Here is a website that gives a fairly detailed theory of operation of the EIS and claims to repair faulty modules
Last edited by Big Daddy; Feb 18, 2014 at 10:22 AM. Reason: included links
After the tow to the dealership we now know it's the steering lock and that my car is one of 5 sitting in Kingston with the problem.
If there is a Class Action suit I want in. If there is a recall I want to know. This is a known problem and shame in Benz for doing nothing.
Needless to say, I will go back to BMW after this. I tell you what, this wouldn't happen to a Ford or Toyota.
Reading this and other threads, I can only conclude there must have been a bad batch of EIS in the 2008 C300. Mercedes should own up to this critical failure and recall all the C300s affected.
The Best of Mercedes & AMG
Originally my mechanic had these comments:
SPORATIC RESULTS FROM TESTS, RESULTEDIN LOCATING FAULTS ON THE CRANKSHAFT POSITION SENSOR, WHICH IS ACTUALLY A SCHEDULED MAINTENANCE SERVICE FOR REPLACEMENT.
THE SECOND ISSUE WHICH FINALLY SHOWED UP AND CREATED A SECOND NO START SCENARIO, IS THE (IGNITION SWITCH & TUMBLER) WHICH DISABLES A COUPLE OF FUNCTIONS. FOR SAFETY / SECURITY PURPOSES, WHEN THE IGNITION ASSEMBLY FAILS, IT DISABLES THE IGNITION TUMBER AS WELL, WHICH OBVIOUSLY DISABLES THE KEY RECOGNITION, THEREFORE WILL NOT START OR ALLOW GEARSHIFT FROM IT’S LOCKED POSITION IN PARK.
BASED ON THE ABOVE, WE NEED TO REPLACE THE IGNITION SWITCH, TUMBLER AND CRANKSHAFT SENSOR.
Then this:
WE DETERMINED THE FAULTS ON STARTING ARE THE RESULT OF THE STEERING LOCK ON THE (EIS) ELECTRONIC IGNITON SYSTEM, WHICH NEEDS TO BE ORDERED SPECIFICALLY FOR YOUR VEHICLE.
BECAUSE THE PART(S) ENABLES THE CAR TO BE STARTED, THEY ARE CONSIDERED (TRP) PARTS, AND ARE CLASSIFIED AS THEFT DETERRANT PARTS, AND REQUIRE ADDITIONAL PAPERWORK.
DOCUMENTS REQUIRED:
LEGIBLE COPY OF DRIVERS LICENSE OF PERSON’S NAME WHICH IS RECORDED ON THE TITLE AND REGISTRATION
COPY OF CURRENT REGISTRATION
COPY OF CURRENT INSURANCE COVERAGE.
YOUR ORIGINAL SIGNATURE ON AN xxxx REPAIR ORDER AND YOUR ORIGINAL SIGNATURE ON A (TRP) FORM, WHICH WE SUBMIT TO MB-USA , LOCATED IN DALLAS, TEXAS, TO GET THE PARTS SHIPPED TO LOCAL DEALER FOR INSTALLATION AND PROGRAMMING TO “MARY OR BRIDGE” THE PARTS TO YOUR IGNITION AND SPECIFIC VIN NUMBER, WHICH IS ENCODED ON ALL YOUR ON BOARD COMPUTERS.
LOT’S OF STEPS AT OUR END, PLUS WE HAVE TO SIGN AND VALIDATE OTHER DOCUMENTS TO AUTHENTICATE YOU ARE THE OWNER AND WE ARE REQUESTING THESE PARTS.
ALL YOU NEED TO DO IS STOP BY THE SHOP, BRING YOUR DRIVER’S LICENSE, AND REGISTRATION WITH INSURANCE CARD, AND WE’LL COPY AS NEEDED AND FORWARD TO DALLAS, TEXAS.
ONCE THE PAPERWORK ARRIVES IN DALLAS, THE PARTS ARE TURNED AROUND IN NO MORE THAN 48 HOURS, AND THEN WE CAN CORDINATE INSTALLATION AT THIS END, AND GET YOUR VEHICLE BACK TO YOU.

What they need to do is replace the CPS & then retest.
https://mbworld.org/forums/c-class-w...t-process.html
If after CPS replacement they still have an issue they must ascertain whether it is ESL or the EIS.
When you inserted your key was there recognition that released the lock & allowed you to turn the key?
It is a good idea to properly diagnose what is faulty or most dealers just replace both ESL & EIS costing you double what you need to pay. They should only replace what is required. They are generally too lazy.
I had come across your very informative induction, handshake, and start diagrams and explanations, but it doesn't (can't) explain why the steering wheel would lock sometimes, but not every time, when the car won't start.
Very frustrating business and I am aware that the dealer will charge 2x what is necessary to fix it. RBM Atlanta is fully in the loop of leased cars and warranty repairs.
- Jump Starting Whilst Key Is Inserted
- Power Surge
- Low Battery Voltage
- This from the website that claims they can repair these modules fairly cheaply

- Jump Starting Whilst Key Is Inserted
- Power Surge
- Low Battery Voltage
- This from the website that claims they can repair these modules fairly cheaply
Jump starting can't be performed without inserting the key so they are passing a bit of a dumb comment. I do accept that jump starting needs to be done with care on modern cars.
The EIS can certainly be repaired. ESL probably not economical.
Forums tend to concentrate problems but I do believe it is a bit of a weakness. There have been a number of updates.
The ones that I have seen fail have been on cars that have never been jump started.
Last edited by Glyn M Ruck; Mar 4, 2014 at 07:17 AM.
RP
RP
I would give MB roadside a call first and make sure all is done to double check the jump start procedure and or make sure the battery is not the issue first. (800-4MERC) This use to be a free service to ALL MB owners but now from what I hear is dictated by a minimum $ amount spent with MBUSA.
Sorry for the bad news and I hope it is something easy. (check all related fuses? Double check year of battery production?) Good luck.
The total charge came to "only" $740 thanks to the intercession of Atlanta Autohaus and cooperation of Dennis of RBM, for which I am thankful.
Glyn and other MB techs out there, can you make sense of the codes and sequence that led to the replacement of both the EIS and ESL?
Lastly, to those who are thinking of ditching their 2008 C300 because of this repair, it seems the occurrence of the EIS/ESL failure is not inevitable or even common. I do think that MB should extend the warranty on these parts and repair because it is such a catastrophic failure that has nothing to do with the use or abuse of the vehicle.




