gac

this morning with no warning my car would not turn over and start. called roadside, and while waiting for them after a few tries it finally started but the check engine light remains on. I will have to make an appointment with the dealer next week (since now it starts with no problem) the woman over the phone says if the light remains on it's most likely the emmisions? is this true what does this mean? and what am I in for ($$$)?

thanks!

TMAllison

Until the codes are pulled and posted its just a guessing game.

Could be anything from low batt voltage causing a sensor to be unable to report to its about to explode........

Why not invest in a $50 OBDII scanner so you can pull your own codes?

gac

thanks, I know its just guessing I just want to go to my dealer with a little bit of an upper hand since they could pretty much tell me anything. where do I get the scanner and what do I ask for?
thanks!

TMAllison

OBDII scanner/code reader is all you need. Every auto parts store has them.

Harbor Freight has one for ~$40 i believe.

It will plug into a port above your left knee under the dash.

Benz5656

Could be anything from 02 sensor to MAF sensor, nothing terribly serious as long as it doesn't flash.

c131frdave

You said it wouldn't turn over, or just wouldn't start. There's a big difference.

I've got the shop manual now, and if it didn't even turn over, there's a million things that could be the problem.

Get yourself a scanner like suggested above. You should never ever go to a dealer without knowing what's wrong. Ever. Unless you are Bill Gates.

Skylaw

While the scanner may help you, and also keep someone from BSing you about the problem, also see post 3 at http://www.benzworld.org/forums/w220...ht-my-car.html and http://www.aa1car.com/library/2003/cm70336.htm.

Also, http://www.bba-reman.com/content.asp...on_fault_codes and http://www.benzworld.org/forums/v-cl...-will-get.html may help.

gac

thanks everyone! Drove the car a few times last night starting it up about 4 times "check engine light" is no longer lit up. I realize this problem still remains will have to buy a scanner before going to dealer. by not "turning over" when i started the car it would sound like it wanted to start but never actually started. then it sounded like it was on half way with an odd sound (very weak) and then would shut off. drove around this morning making a few stops and still no light on and starts fine. as I said I just want to go to the dealer knowing a little something about the problem (or at least acting like i know).

Thanks!

gac

was able to get the error code P0335 (crankshaft Position Sensor A Circuit Malfunction) I will let my dealer also do the code check and see what they tell me before I tell them I know what the problem is. any idea what this entails? is it a major job,?

thanks.

TMAllison

It may still be a voltage issue. How old is th battery? If OEM its prob at the end of its life.

The CPS is on top of the trans bell housing on the drivers side usually. Can be seen looking down between back of engine and firewall. Hard to reach. Reads position of the flywheel and provides that data to initiate spark and fuel delivery timing. They are a common part that fails; gets hot and stops providing data, cools off and works again. Most of them take about an hour to replace and the part is usually between $50-100.

gac

Thanks TM! battery is about 4 years old maybe older.

TTMotorsports

Where on Long Island are you located?

We can diagnose and repair any malfunction in the car... All of this can be done on the spot while you wait and you don't have to worry about "getting the upper hand" as we are not out there to steal money from you.

You can bring the car down to our shop in Farmingdale and have us check it out or we can send a technician with a full Mercedes diagnostic system out to your house and find out what's going and what's required to repair it.

gac

Live in Lynbrook. my mercedes dealer is Lakeview.

TTMotorsports

Okay, would you like to bring it down tomorrow morning and I will go over the car with you?

We can also have someone come by your house and tell you what's wrong with it.