W203 M111 cold start issue
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Joined: Jun 2019
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W203 C200 Elegance
W203 M111 cold start issue
Hiya guys
I have a w203.045 M11.955 c200 Kompressor with a weird start up issue. Car has done 240000kms (roughly) and had alot of $$$ poured into it but I'm at a loss as to what causes this issue.
When the car has sat overnight and is cold on 1st startup the idle is rough (seems like stuttering/surging) after approx 1-2 mins (I'm assuming its cold loop) when it comes off cold idle loop it runs perfectly, if I start it and engage drive it will stutter until it's warm. This only happens when the car is cold and generally won't do it again all day. At the 28 sec mark on the larger video this will demonstrate what i mean.
I've replaced: Maf, plugs, exhaust manifold (had crack), both O2 sensors, cam magnet sensor, rocker cover gasket (leaked), and not showing any one codes that my iCarsoft can pickup.
I have a w203.045 M11.955 c200 Kompressor with a weird start up issue. Car has done 240000kms (roughly) and had alot of $$$ poured into it but I'm at a loss as to what causes this issue.
When the car has sat overnight and is cold on 1st startup the idle is rough (seems like stuttering/surging) after approx 1-2 mins (I'm assuming its cold loop) when it comes off cold idle loop it runs perfectly, if I start it and engage drive it will stutter until it's warm. This only happens when the car is cold and generally won't do it again all day. At the 28 sec mark on the larger video this will demonstrate what i mean.
I've replaced: Maf, plugs, exhaust manifold (had crack), both O2 sensors, cam magnet sensor, rocker cover gasket (leaked), and not showing any one codes that my iCarsoft can pickup.
Last edited by danski83; Apr 6, 2020 at 05:15 AM. Reason: Added extra link
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Joined: Jan 2023
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From: Southern part of Sweden
02' C200 Kompressor
Following up.
Hi, I hope this reply reaches you well. I sadly do not have the answer to this problem, however I am experiencing it myself, except mine seems to take a little longer to start. I would love it if you managed to solve it and if so would share the solution.
Best regards,
Zela
Best regards,
Zela
Newbie
Joined: Jan 2023
Posts: 2
Likes: 0
From: Southern part of Sweden
02' C200 Kompressor
I had it checked up at the mechanic, not a certified shop but they have a lot of experience with BMW and Mercedes cars. I had already gotten the usual parts needed to maintain the M111's integrerat such as the camshaft position sensor and MAF sensor. They switched them out while diagnosing and found a leak in the crankshaft ventilation hose going to the supercharger I believe. Order a set of vacuum hoses and wich are set to arrive in the middle of march. Some notes I've taken are that even if it runs, it loses a lot of effect above 3500rpm. The starts are real rough followed by the general fault codes p0171 and p0303(missfire). From the sheat I got from the shop both of those could be explained by the vacuum leak. When trying to show me the leak it didn't appear though, but I trust them for their word. I will get back to you once I've received and swapped out the presumably damaged hose and checked on the secondary air injection system.
Thank you all for helping out!
Thank you all for helping out!
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Joined: Mar 2023
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W203.045
I had it checked up at the mechanic, not a certified shop but they have a lot of experience with BMW and Mercedes cars. I had already gotten the usual parts needed to maintain the M111's integrerat such as the camshaft position sensor and MAF sensor. They switched them out while diagnosing and found a leak in the crankshaft ventilation hose going to the supercharger I believe. Order a set of vacuum hoses and wich are set to arrive in the middle of march. Some notes I've taken are that even if it runs, it loses a lot of effect above 3500rpm. The starts are real rough followed by the general fault codes p0171 and p0303(missfire). From the sheat I got from the shop both of those could be explained by the vacuum leak. When trying to show me the leak it didn't appear though, but I trust them for their word. I will get back to you once I've received and swapped out the presumably damaged hose and checked on the secondary air injection system.
Thank you all for helping out!
Thank you all for helping out!
Opps, it was a 3 years old thread and Zela you are not the TS, sorry, hope danski83 has solved this
Last edited by premier1; Mar 26, 2023 at 05:35 AM. Reason: it was a 3 years old thread
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W203.045
Hi Zela , driving the same year 2002, W203.045
Searching high and down for all the possible parts for replacement.
First, the notorious bloody Red Magnesium M111 spark plug cover, 111 150 1975
Plan to get one and powder coat it like some other members here did.
Front Hood Absober (red Button) 2038800429 has gone, only be able to sustain if I pressed the red button to lift up further
Foot step cover Front Right, 2036862636
(Handbrake) Pull Handle 2034270620
These two have cracked, should not have problem to get them
Blinker / Signal / WiperSTEERING SWITCH0005452310 is a bit tight, hope I could lubricate it without changing the whole switch (anyone can tutor me on this ? hahaha)
Beside that, having the 1 . SRS Air bag Fault Code, 2 . the Radiator Coolant Level Fault Code, 3 . Wiper washer tank level Fault Code
Car is 21 years old and currently on 170,000 KM,
Will solve this problem one by one, good luck to all of us !
Searching high and down for all the possible parts for replacement.
First, the notorious bloody Red Magnesium M111 spark plug cover, 111 150 1975
Plan to get one and powder coat it like some other members here did.
Front Hood Absober (red Button) 2038800429 has gone, only be able to sustain if I pressed the red button to lift up further
Foot step cover Front Right, 2036862636
(Handbrake) Pull Handle 2034270620
These two have cracked, should not have problem to get them
Blinker / Signal / WiperSTEERING SWITCH0005452310 is a bit tight, hope I could lubricate it without changing the whole switch (anyone can tutor me on this ? hahaha)
Beside that, having the 1 . SRS Air bag Fault Code, 2 . the Radiator Coolant Level Fault Code, 3 . Wiper washer tank level Fault Code
Car is 21 years old and currently on 170,000 KM,
Will solve this problem one by one, good luck to all of us !
