C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

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Old May 27, 2009 | 08:03 AM
  #101  
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2002 C240
Get those codes and post back in here so we can help you.
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Old May 27, 2009 | 10:54 AM
  #102  
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yeah - pull codes. We seem to be having a spate of wire problems on V6s - FrankW's C32 had wire problems the other day.
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Old May 28, 2009 | 05:44 AM
  #103  
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c32
okay bought the odb reader today. I tried to look for the plug to plug it in and couldnb't find it....I thought it was under the steering wheel...I can't find it all i found was a small amp that was held underneath by 2 torx screws. hmmmm....
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Old May 28, 2009 | 08:09 AM
  #104  
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2002 C240
You are not going to find the plug under steering wheel exposed, it has a small black plastic door that you need to open in order to gain access to the plug. Just look very well in that area and you will find it.
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Old May 28, 2009 | 10:52 AM
  #105  
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Small oblong hinged door
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Old May 28, 2009 | 03:30 PM
  #106  
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c32
thanks guys found it...well post codes in a min...
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Old May 28, 2009 | 03:44 PM
  #107  
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c32
okay...so stupid the obd reader I bought is missing the adapter to plug in my car. I must of bought one where someone stole the plug. gosh...btw glyn M ruck is it okay to drive the car when it's having this problem right now? i was thinking of just driving it to my mechanic to get him to give me the codes.
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Old May 28, 2009 | 04:56 PM
  #108  
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
If fluid levels & temperature is OK you can drive it. Just don't do a 1000 mile trip.
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Old May 28, 2009 | 06:51 PM
  #109  
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c32
got the code it's po302-Cylinder 2 misfire. now what should i do next? keep in mind i'm no mechanic. and i'm not familiar w/ the internals.lol
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Old May 29, 2009 | 05:19 AM
  #110  
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Swap No 2 wire & coil with another cylinder. Mark them so you don't get confused. Cancel codes & go for a run. If the code changes cylinder then you know it is the wire/coil. If so - replace
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Old May 29, 2009 | 06:11 PM
  #111  
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c32
do you know if the coil/wire is on the left side of the engine or the ride side? also how do i even take the coil out? sorry for the stupid questions!

Last edited by batman6; May 29, 2009 at 06:30 PM.
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Old May 29, 2009 | 08:18 PM
  #112  
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by batman6
do you know if the coil/wire is on the left side of the engine or the ride side? also how do i even take the coil out? sorry for the stupid questions!
The coil packs are mounted on the cylinder head covers (rocker boxes) on either bank of the engine with wires going to 2 plugs per cylinder.



Attached Thumbnails Wow Check engine light-c32-coils.gif   Wow Check engine light-c32-engine2.gif  
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Old Jun 1, 2009 | 10:48 PM
  #113  
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c32
i can't seem to get the spark plug wire off. anyone have any advice or tips to take em out i bought a spark plug wire plier but it doesn't seem to work. the plugs are just on too tight.
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Old Jun 2, 2009 | 12:03 AM
  #114  
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c32
okay loosen up the coil parks but I found this...is this bad? most of the oil i saw was on the left side of the engine.....see pic





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Old Jun 2, 2009 | 01:15 AM
  #115  
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c32
okay swapped the first 2 coil packs on the left side of the engine and tested it with the obd reader, it reads O. I started up the car and it sounds fine but there's shaking like something bad is going to happen. ANyways if the OBD reads Zero i'm guessing it's not the coil packs? what should I do now. should swap back the coil packs to the right places and then test with OBD reader again?
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Old Jun 2, 2009 | 09:22 AM
  #116  
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Drive the car for a few days & see if a misfire code returns and at what location. Those oil leaks are pretty common. Need new rocker box cover gaskets.
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Old Jun 2, 2009 | 07:58 PM
  #117  
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c32
code returned. it now reads po301 -cycliner 1 misfire. gonna replace the coil pack and that should do the trick. should i just replace all the spark plugs while i'm at it?
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Old Jun 2, 2009 | 08:54 PM
  #118  
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2002 C240
You still need to replace the valve cover gaskets (I did a year ago) you don't want all that oil dripping down on the spark plug wires, exhaust, etc... I would replace the wires and plugs as part of regular maintenance, then check the coil packs after that.
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Old Jun 3, 2009 | 01:07 AM
  #119  
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Originally Posted by batman6
okay loosen up the coil parks but I found this...is this bad? most of the oil i saw was on the left side of the engine.....see pic





replace the seal for the rockerbox gasket.

and you missed a "0" in your profile.
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Old Jun 3, 2009 | 07:01 AM
  #120  
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c32
Originally Posted by FrankW
replace the seal for the rockerbox gasket.

and you missed a "0" in your profile.

anyone have a DIY on how to replace the seal for the rockerbox gasket?
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Old Jun 3, 2009 | 08:19 AM
  #121  
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quick question since you guys are talking about plugs. i just did a major tune-up on my car, oil change, tranny service, fuel filter, cleaned MAF, cleaned K&N filter, switched to NGK iridium spark plugs, old ones were bosch, replace battery, replace suspension bushings.

My car is a 2003 c230 sedan 75k miles.

my question: i used to get 23mpg to 27mpg. now i get 16mpg at idle and 19 city and 26 freeway. what could have caused this? spark plugs? MAF? or fuel filter? those are the only possibilities i could think of..
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Old Jun 3, 2009 | 10:53 AM
  #122  
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by batman6
code returned. it now reads po301 -cycliner 1 misfire. gonna replace the coil pack and that should do the trick. should i just replace all the spark plugs while i'm at it?
Good - I would replace 1 coilpack, all wires & plugs & do rocker gaskets. They are not leaking badly - a nip up might help them but you are delaying the inevitable. Good Luck
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Old Jun 3, 2009 | 03:16 PM
  #123  
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c32
by wires do you mean the ones connected to the coilpack and then to the spark plug part no. 17 on that picture you gave me? if that's the case my dealer quoted me about $70 per wire. WOuld that mean I would have to replace all 12 connector wires? that would be about $840!! again anyone have diy on replacing the gasket?
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Old Jun 3, 2009 | 04:38 PM
  #124  
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Originally Posted by mbcollector
quick question since you guys are talking about plugs. i just did a major tune-up on my car, oil change, tranny service, fuel filter, cleaned MAF, cleaned K&N filter, switched to NGK iridium spark plugs, old ones were bosch, replace battery, replace suspension bushings.

My car is a 2003 c230 sedan 75k miles.

my question: i used to get 23mpg to 27mpg. now i get 16mpg at idle and 19 city and 26 freeway. what could have caused this? spark plugs? MAF? or fuel filter? those are the only possibilities i could think of..
16mpg at idle? I get 0mpg sitting still.

How long has it been since you did this service and how many tanks have you noticed be this much worse?
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Old Jun 3, 2009 | 05:29 PM
  #125  
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2002 C240
Stay away from the dealer for spark plugs and wires. Go to Napa and ask for Bosch replacement wires for your car. The cost about $18 each and they look just like the originals except they don't say Mercedes on it or have the star.
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