Mercedes S500 2007 P0016, P0011, P0300 RANDOM MISSFIRE ONLY HOT !
Thread Starter
Junior Member
Joined: May 2019
Posts: 25
Likes: 2
w221 S550 4 matic 2007/2011 year
Mercedes S500 2007 P0016, P0011, P0300 RANDOM MISSFIRE ONLY HOT !
Hello, I am writing to protect people from being misdiagnosed by mechanics because I was diagnosed by a mechanic and paid dearly for it.
The car is a 2007 S500, the engine runs perfectly, it starts perfectly when cold, there are no noises from anywhere, perfect acceleration. I can drive for hours and the car has no problems.
The moment I turn the car off and try to start it hot / at operating temperature, MISSFIRE RANDOM P0300, P0016, p0011 starts.
Note that the problem only occurs when the car is warm, a well-warmed engine.
The engine was on time, everything was in place!I replaced a whole engine, the problem with the other engine remained exactly the same, when the engine warmed up well, misfire p0300, p0016, p0011.
I took matters into my own hands.
All coils, crankshaft sensor, spark plug were replaced, the car did not recover.
With the engine well warmed up, I turned off the engine, I know that if I try to start it when it is warm, the problem will appear. I PLACED A LARGE BLOCK OF ICE ON THE ENGINE ECU. When I cooled the computer the car ran perfectly with no MISFIRE RANDON and no errors.
I am writing this long post to protect colleagues from a similar problem and wrong diagnoses by masters.
I just replaced the computer/reprogrammed it and the problem went away. MY ADVICE TO YOU is before you throw money at expensive repairs please don't trust computer errors, very often they are wrong, unfortunately I found out the hard and expensive way.
Recently I saw a good test on the Internet, I did the same thing, only I directly put a huge lump of ice, and the colleague put it in the refrigerator. This is the easiest and fastest diagnosis
The car is a 2007 S500, the engine runs perfectly, it starts perfectly when cold, there are no noises from anywhere, perfect acceleration. I can drive for hours and the car has no problems.
The moment I turn the car off and try to start it hot / at operating temperature, MISSFIRE RANDOM P0300, P0016, p0011 starts.
Note that the problem only occurs when the car is warm, a well-warmed engine.
The engine was on time, everything was in place!I replaced a whole engine, the problem with the other engine remained exactly the same, when the engine warmed up well, misfire p0300, p0016, p0011.
I took matters into my own hands.
All coils, crankshaft sensor, spark plug were replaced, the car did not recover.
With the engine well warmed up, I turned off the engine, I know that if I try to start it when it is warm, the problem will appear. I PLACED A LARGE BLOCK OF ICE ON THE ENGINE ECU. When I cooled the computer the car ran perfectly with no MISFIRE RANDON and no errors.
I am writing this long post to protect colleagues from a similar problem and wrong diagnoses by masters.
I just replaced the computer/reprogrammed it and the problem went away. MY ADVICE TO YOU is before you throw money at expensive repairs please don't trust computer errors, very often they are wrong, unfortunately I found out the hard and expensive way.
Recently I saw a good test on the Internet, I did the same thing, only I directly put a huge lump of ice, and the colleague put it in the refrigerator. This is the easiest and fastest diagnosis
Last edited by metodiev; Sep 11, 2022 at 06:05 AM.
MBWorld Fanatic!
Joined: Aug 2014
Posts: 5,319
Likes: 1,675
S500
coil packs - swap to another cyl an check the code moves with the broken coil pack - 100% standard failure mode - the v6 petrol has the same parts
also CPS (crank position sensor) standard one to age, causes stalling in traffic (and can fail to start when hot)
there's a thing called google translate - then we can read what u wrote
also CPS (crank position sensor) standard one to age, causes stalling in traffic (and can fail to start when hot)
there's a thing called google translate - then we can read what u wrote
