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#1
05-20-2006, 02:50 AM
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W202 Help
Hey everyone,
My fairly low mileage (53,000miles) 99 C230 has gotten a problem lately. When starting her up (overnight or few days cold) it hesitates badly for about 4-6 seconds, almost wanting to stall but never did. Once it gets going it idles perfectly and is good the rest of the day. This mostly happens now if the car sits for a whole day or more. I also noticed very very slight shake or "twitching" in the engines idle when in P and fully warmed up. I was thinking its time for the fuel filter to be done but read it doesnt cure the problem. MAS I done 5,000 miles ago and spark plugs by previous owner at the MB dealer 12,000 miles ago as marked in the book. Any ideas on the kompressor engine as the cause? Please help out guys....much thanks.  
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99 C43 98 S420 99 C230K 01 C240 
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#2
05-20-2006, 08:13 PM
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Keep in mind I'm 100% unqualified to say this, but I would look at:
1 - cat 2 - wires that lead to spark plugs 3 - gas cap If you accelerate when it's trying to stall, does it throw the CE light, and, if so, what codes?
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Michael 1988 300 SL (5 Speed) 1994 E320 Wagon 1997 C230
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#3
05-20-2006, 08:58 PM
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Go to Canadian Tire, get a can of throttlebody cleaner, spray the throttleplate & see what happens.
You got nothing to loose, except $ 5.00 & 1/2 hour of work. 
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2007 C 230 Sport.
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#4
05-21-2006, 01:29 AM
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No check engine light. When driving its driving like its new. Ive done a few italian tune ups and it helped slightly...aswell maybe its my fault I "baby" the car? By this I mean..2000rpm shifts while driving.
Im hoping its carbon build-up! I will try the throttle body thing if nothing else. What about fuel filter?
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99 C43 98 S420 99 C230K 01 C240
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#5
07-25-2006, 05:38 PM
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Marko,
I had the same symptoms with my low km 1999C230 sport last summer. Was unable to get a proper determination of the problem as their were no codes. I continued to use the car and eventually it died in traffic. Towed to independent repair shop in Richmond Hill who determined it was a faulty fuel pump. Replaced fuel pump and filter and all has been fine since. Problem never returned.
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#6
07-25-2006, 07:01 PM
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Check plugs to make sure they are the factory type and gap, also for signs of arcing along the insulator in case someone cleaned the engine and filled a plug hole with water.
Gilly
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Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#7
08-14-2006, 11:41 AM
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Im gonna check the plugs now one day. I bought a fuel filter I attempted to change myself but was unsure where it was underneath in the back (near rear wheel well).
Also, is it true plugs need to be done every 30,000miles on the kompressor engine?
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99 C43 98 S420 99 C230K 01 C240
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#8
08-14-2006, 11:57 AM
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Quote:
I change mine every 50 000 km = @ 30 k miles, and they ususally look like it's about time.
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2007 C 230 Sport.
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#9
08-14-2006, 12:13 PM
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I've seen faulty throttle actuators cause symptoms like yours'. The motor that controls the throttle valve can't overcome the return spring tension quickly enough. Try holding the gas pedal down about halfway while the engine is cranking, then release it the instant the engine starts. If the problem goes away, the actuator is the likely cause. Of course, if you have access to SDS you can test the actuator via the "Actuations" menu choice. I've found many actuators that can lower the engine speed with no problem (due to the help of the return spring), but have trouble increasing RPM. Good luck
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