Mercedes-Benz Forum banner

1 - 20 of 31 Posts

·
Registered
2005 Mercedes Benz c240 base w203 sedan
Joined
·
9 Posts
Discussion Starter #1
Hey all, I'm in desperate need of some advice.
Last summer I bought a 2005 C240 with 42k miles on it, it drove really well until it hit winter time and got cold, then one cold morning I went to start it and it would not start at all. I had to push my foot on the gas pedal to get it to start. So last winter I brought it to a mechanic who said it was my fuel injectors, so he replaced them. That didn't fix it. Then he said it was my fuel pump and filter. That didn't fix it. Then he said it was my spark plugs. That didn't fix it. After all this happened, it started to get warmer and the car would start up fine. Well, it's winter time again so I bought it to another mechanic who works for Ferrari and Tesla and he said it was my camshaft and crankshaft sensor. He installed them tonight, that didn't fix it. I'm at a loss, no mechanic can find out what's wrong with this thing and Mercedes wants to charge me $200 an hour just to look at it, I really can't afford that. Has _anyone_ had similar problems and could point me in the right direction as far as what is wrong? My next step is really to just bring it to Mercedes but I'm not going to have enough money to get my car back once they diagnose it =X
 

·
Registered
1986 230E
Joined
·
183 Posts
I am not real fluent in the newer stuff but i may be of some help. Engines need more fuel when cold starting this is why when you step on the gas it starts. What you need to find is either a bad temp sensor which tells the computer to dump more fuel automatically on a cold start or maybe a cold start solenoid. If you find the temp sensor or sensors (maybe more than one) you can porbably test them yourself, just Google it ;) Sometimes all you need is a 9 volt battery to test them. Also the Mechanics you took your car too don't sound to reliable i would not have replaced any of those parts first.
 

·
Premium Member
2001 E320 - Brilliant Silver/Ash: 107,000+
Joined
·
17,193 Posts
I would probably have started with an MB dealer and if they gave me a long laundry list of recommended work, then seek a 2nd opinion. $200/hour is ridiculous, mine charges $102.
 

·
Registered
2005 Mercedes Benz c240 base w203 sedan
Joined
·
9 Posts
Discussion Starter #4
They ended up diagnosing it as a computer issue, and narrowed it down to the ring gear on the ME computer which wasn't communicating correctly, so they re-installed and reset the part and they said it works now. They had it for over a week. I haven't tested it myself, won't know till tomorrow morning, but they said they made sure it was working before they wanted to give it back to me. I guess on the bright side of all the parts I bought and had put in is that they're new so I shouldn't have any problems with those for a while lol..
 

·
Registered
Whatever car has the gas in it
Joined
·
1,891 Posts
Hey all, I'm in desperate need of some advice.
Last summer I bought a 2005 C240 with 42k miles on it, it drove really well until it hit winter time and got cold, then one cold morning I went to start it and it would not start at all. I had to push my foot on the gas pedal to get it to start. So last winter I brought it to a mechanic who said it was my fuel injectors, so he replaced them. That didn't fix it. Then he said it was my fuel pump and filter. That didn't fix it. Then he said it was my spark plugs. That didn't fix it. After all this happened, it started to get warmer and the car would start up fine. Well, it's winter time again so I bought it to another mechanic who works for Ferrari and Tesla and he said it was my camshaft and crankshaft sensor. He installed them tonight, that didn't fix it. I'm at a loss, no mechanic can find out what's wrong with this thing and Mercedes wants to charge me $200 an hour just to look at it, I really can't afford that. Has _anyone_ had similar problems and could point me in the right direction as far as what is wrong? My next step is really to just bring it to Mercedes but I'm not going to have enough money to get my car back once they diagnose it =X
$200 per hour to work on a W203?:eek: Hopefully it starts and is in working order now. What I would also do is invest in a OBD Scanner so you can check the codes if/when a event like this occurs. Keep us posted!
 

·
Registered
2005 c320 4matic
Joined
·
70 Posts
Sounds like a problem mine had but the crankshaft position sensor replacement fixed it. Wow $200 who's charging you that? MB dealers don't even charge that much.
 

·
Registered
2005 Mercedes Benz c240 base w203 sedan
Joined
·
9 Posts
Discussion Starter #7 (Edited)
I actually misunderstood the guy on the phone regarding their rate, it's not $200 an hour, it's $129, sorry bout that confusion.

edit: so a little update in case someone stumbled onto this thread and has the same issue as me. After they gave the car back to me, a couple nights later it had the problems all over again. Frustrated, I called Mercedes corporate and they were able to get me 3 hours of free work at the dealership, during which case the dealership reprogrammed the computer on the car. I've had it back for weeks now and even on a night where it dropped below 0 degrees Fahrenheit it started up like a champ. So my problem this whole time was a computer issue...
 

·
Registered
2005 C240
Joined
·
8 Posts
Im having a similiar problem

When you were having this problem, once the car was started did it give you any more starting problems during the day? I am having the same issue but once mine starts its good to go for the day, I can restart it no problem, just seems like its doesn't want to start first thing in the morning. It didn't do this last winter either, just noticed it this winter as it started cooling down, and it doesn't get that cold here in central valley, ca. Low around 30 @ night.
 

·
Registered
Joined
·
5 Posts
2003 cl55 amg After replacing cps 3 times in a week The dealer said it neads New module $3800 did any one had this problem before? Thanks guys
 

·
Registered
Joined
·
5 Posts
When I got stock in fort Myers fl the mb dealer charged me $750 to replace cps then after 2 hours of driving I made a stop and no start next morning after doing some recearch disconnected the wire from CPS and connected it again and the engine started ,went to AutoZone and purchased a new sensor and installed it after 2 more hours of driving made an other stop and no star now it's back o. The dealer and they said its a module problem a $3800 parts and labor I hope that fixes the problems
 

·
Registered
92 300CE/1996 mustang cobra (supercharged)/12 Civic/15 F150/04 F150 mud truck
Joined
·
8,105 Posts
your cars are newer but the fundamentals are the same

if you cant start it, its either a spark or a fuel issue.
if it cranks then it is a fuel issue.

now- in the winter, all the condensation in the tank freezes up and makes it difficult to start the car. depending on your fuel source (favorite gas station) , it may already have excessive moisture. the moisture can freeze in the lines on impede the flow of fuel through the fuel filter.


Simple tip- get some HEET (RED BOTTLE) from walmart. put 2 in the tank and go for a quick highway run.

The HEET converts the condensation in the tank and burns it off as water. it helps !
 

·
Registered
92 300CE/1996 mustang cobra (supercharged)/12 Civic/15 F150/04 F150 mud truck
Joined
·
8,105 Posts
Tip #2
of possible, change the fuel filter. it could be clogged and the moisture is hindering the fuel system
 

·
Registered
2005 C240
Joined
·
8 Posts
Mine is actually flooding. I can pull the pump fuse and it will fire right up. Plug the fuse back in before it drives and it runs fine. Something is telling computer to throw more fuel in than needed. Any ideas on this?
 

·
Registered
Joined
·
5 Posts
The fortmeyers dealer in Florida charged me $750 for the cps I didn't know better
The next day I replaced an other one cost me $54 I did it in 45 minutes
However that was never the problem now I'm stock at the dealer in pompano beach they say the module is not communicating with the cps $3800 , I don't know if I can trust the dealers specialy when There is no waranty left on the car
 

·
Registered
Joined
·
1 Posts
Mine is actually flooding. I can pull the pump fuse and it will fire right up. Plug the fuse back in before it drives and it runs fine. Something is telling computer to throw more fuel in than needed. Any ideas on this?
This is exactly whats happening to mine!!! have you figured the problem out?
 

·
Registered
Joined
·
9 Posts
When you were having this problem, once the car was started did it give you any more starting problems during the day? I am having the same issue but once mine starts its good to go for the day, I can restart it no problem, just seems like its doesn't want to start first thing in the morning. It didn't do this last winter either, just noticed it this winter as it started cooling down, and it doesn't get that cold here in central valley, ca. Low around 30 @ night.
Exactly the same problem with my 2004 C240. Problem started a couple of years ago. Changed battery, a full tune-up replacing plugs,all filters, and all fluids. Even replaced Cam position sensor and crank position sensor. And still having problems with the morning start. The car had about 40k miles and car is always garaged indoor when problem first surfaced. I read somewhere it might be Engine Control Unit. Need to replaced or reprogrammed. Pretty disappointed with my first MB.
 

·
Registered
Joined
·
9 Posts
Exactly the same problem with my 2004 C240. Problem started a couple of years ago. Changed battery, a full tune-up replacing plugs,all filters, and all fluids. Even replaced Cam position sensor and crank position sensor. And still having problems with the morning start. The car had about 40k miles and car is always garaged indoor when problem first surfaced. I read somewhere it might be Engine Control Unit. Need to replaced or reprogrammed. Pretty disappointed with my first MB.
Also read about looking into the temperature sensors.
 

·
Registered
Joined
·
9 Posts
I actually misunderstood the guy on the phone regarding their rate, it's not $200 an hour, it's $129, sorry bout that confusion.

edit: so a little update in case someone stumbled onto this thread and has the same issue as me. After they gave the car back to me, a couple nights later it had the problems all over again. Frustrated, I called Mercedes corporate and they were able to get me 3 hours of free work at the dealership, during which case the dealership reprogrammed the computer on the car. I've had it back for weeks now and even on a night where it dropped below 0 degrees Fahrenheit it started up like a champ. So my problem this whole time was a computer issue...
This is exactly what is happening to my 2004 C240. I had the car fully serviced, changed plugs, filters, fluids, Crank Position Sensor and Cam Position Sensor, and the battery. It take a couple of tries to start the car during the cold winter months. Can I ask you what was done to the computer on the C240? Can anybody shed some information on this? Btw, is this a job only the dealer can perform??? If so, how do I explain to it to them??? After reading about this cold starting problem, it beginning to sound like a bad design flaw in the C240. Thanks for any ideas that can get my problem solved.
 

·
Registered
Joined
·
9 Posts
2004 C240 Cold Start problem w/60K miles

These days, I have to try several attempts to start the C240. Problem with the cold start started to happen late December. Can someone please shed some light regarding an update to the Engine Control Unit (I am assuming it is a software update of some sort) and a cost estimate. For the last few years, I haven't solved my cold start problem. Any suggestion will be greatly appreciated. Thanks......:|
 
1 - 20 of 31 Posts
Top