How many C coupes are still here?
06-20-2024, 11:52 AM
#76
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Join Date: Apr 2024
Location: Helsinki, Finland
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C230K Sportcoupe 2002 (early M271)
Greetings
Another year at most and it's definitely getting a rebuild. It's discernible when listening but could be worse
Regarding your noise on load, after I changed the front lambda I got a rough, clunky engine noise under load 2000-3000 rpm which is independent from the engine revs (M111), only on warm engine . No idea whatsoever.
Do I have a chance to diagnose it without STAR? Spark plugs looks more lean since the Lambda change. It was a nightmare to get the Lambda out, totally seized.
I'm not an expert! However, if the front lambda was nasty, sounds like you might now be experiencing the same issue.
The other lambda isn't expensive (got a Bosch for well under 100eur) so I would definitely replace that too first, and see if it helps.
Could also get a reading with a regular OBD tester and check for codes. A code indicating running lean (or something similar) would point to the same issue - a wacky sensor causing overfeeding of fuel, which cat then has to burn, putting it at risk.
Forgot to mention but since I was running rich, fuel efficiency was horrid. If it's up in comparison to your baseline by some liters per 100km, another clear sign.
Good luck, let us know how it goes!
Another year at most and it's definitely getting a rebuild. It's discernible when listening but could be worse
Regarding your noise on load, after I changed the front lambda I got a rough, clunky engine noise under load 2000-3000 rpm which is independent from the engine revs (M111), only on warm engine . No idea whatsoever.
Do I have a chance to diagnose it without STAR? Spark plugs looks more lean since the Lambda change. It was a nightmare to get the Lambda out, totally seized.
The other lambda isn't expensive (got a Bosch for well under 100eur) so I would definitely replace that too first, and see if it helps.
Could also get a reading with a regular OBD tester and check for codes. A code indicating running lean (or something similar) would point to the same issue - a wacky sensor causing overfeeding of fuel, which cat then has to burn, putting it at risk.
Forgot to mention but since I was running rich, fuel efficiency was horrid. If it's up in comparison to your baseline by some liters per 100km, another clear sign.
Good luck, let us know how it goes!
06-21-2024, 02:17 AM
#77
MBWorld Fanatic!
Thread Starter
Listening to SC with a screwdriver, those vanes thrashing around inside do make a racket, but I
don't think thats abnomal. I thought mine had siezed. Actually it was the alternator.
I found one online with 79K original miles off an SLK for $250 delivered (it was a yard and they posted a pic of the
Odo) before I knew it was the alternator. So I replaced it anyway with new oil, kept the old (2nd one)
as a spare along with the alternator. Much easier to access alternator with SC out of the way anyway.
I never had any problems with the 02 sensors, since I just replaced them as suggested by Mercedes at 100K miles.
don't think thats abnomal. I thought mine had siezed. Actually it was the alternator.
I found one online with 79K original miles off an SLK for $250 delivered (it was a yard and they posted a pic of the
Odo) before I knew it was the alternator. So I replaced it anyway with new oil, kept the old (2nd one)
as a spare along with the alternator. Much easier to access alternator with SC out of the way anyway.
I never had any problems with the 02 sensors, since I just replaced them as suggested by Mercedes at 100K miles.
Last edited by C230 Sport Coup; 06-21-2024 at 02:22 AM.
06-21-2024, 10:28 AM
#80
Still think this is the best system in the car industries. The placement is in the right spot where you have to look at. The information is enough and no TMI. It gets activated when you drive slow and has a side sensor to protect your mirror.
In the vid you can hear the play in the coupler if you wiggle the supercharger pulley with your hand. You can get new ones from ebay 10-20$.
In the vid you can hear the play in the coupler if you wiggle the supercharger pulley with your hand. You can get new ones from ebay 10-20$.
Last edited by 112233; 06-21-2024 at 10:41 AM.
06-21-2024, 10:31 AM
#81
Newbie
Join Date: Apr 2024
Location: Helsinki, Finland
Posts: 7
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C230K Sportcoupe 2002 (early M271)
Listening to SC with a screwdriver, those vanes thrashing around inside do make a racket, but I
don't think thats abnomal. I thought mine had siezed. Actually it was the alternator.
I found one online with 79K original miles off an SLK for $250 delivered (it was a yard and they posted a pic of the
Odo) before I knew it was the alternator. So I replaced it anyway with new oil, kept the old (2nd one)
as a spare along with the alternator. Much easier to access alternator with SC out of the way anyway.
don't think thats abnomal. I thought mine had siezed. Actually it was the alternator.
I found one online with 79K original miles off an SLK for $250 delivered (it was a yard and they posted a pic of the
Odo) before I knew it was the alternator. So I replaced it anyway with new oil, kept the old (2nd one)
as a spare along with the alternator. Much easier to access alternator with SC out of the way anyway.
I recall reading that a bad A/C compressor can also make some similar noises, but don't quote me on that
Last edited by CL203 from HEL; 06-21-2024 at 11:53 AM. Reason: more replies
07-09-2024, 10:57 AM
#82
Senior Member
Mine still my everyday driver pretty much with me doing a 150K service on it now.
Trying to figure out what struts to put on it as it needs them but dont want it too low?
Needs most of the suspension pieces up front.
Also what is the best way to get camber adjustment in the rear as it has too much negative camber in the rear.
Trying to figure out what struts to put on it as it needs them but dont want it too low?
Needs most of the suspension pieces up front.
Also what is the best way to get camber adjustment in the rear as it has too much negative camber in the rear.
07-09-2024, 04:35 PM
#83
Mine still my everyday driver pretty much with me doing a 150K service on it now.
Trying to figure out what struts to put on it as it needs them but dont want it too low?
Needs most of the suspension pieces up front.
Also what is the best way to get camber adjustment in the rear as it has too much negative camber in the rear.
Trying to figure out what struts to put on it as it needs them but dont want it too low?
Needs most of the suspension pieces up front.
Also what is the best way to get camber adjustment in the rear as it has too much negative camber in the rear.
For the look, I added wheel spacers and changed the spring support rubber to the thickest one.
07-10-2024, 12:55 AM
#84
Senior Member
Do you have a link for the adjustable arms?
07-10-2024, 03:00 AM
#85
07-11-2024, 01:25 AM
#86
SPONSOR
Front Camber & Caster along with rear Camber has been deleted.
All to do with ever increasing speed of new car assembly lines - STOPPING TO SET / ADJUST CAMBER / CASTER IS NO LONGER AN OPTION.
Now it is set to suit SHOWROOM HEIGHT conditions !
ONUS NOW BACK ON OWNERS - To fund costly, premature tire wear.
Yet adjustment is essential - encountering in day to day commuting - high cambered roads with excess passenger side edge wear. Extra load carrying or altering suspension height. Fitting wide profile tires and now nothing to adjust / compensate for curb knock damage !
K-MAC has the experience of resolving OEM suspension shortcomings since 1964. Manufacturing Front and Rear kits - AUDI to VOLVO and to suit all Mercedes Benz models 1968 to 2024.
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AUDI to VOLVO - Experience Of Resolving OEM Suspension Shortcomings (and costs) Since 1964 !
07-19-2024, 12:47 AM
#87
MBWorld Fanatic!
Thread Starter
You will need to remove the entire wiring harness and soak it to get all the oil out.
I guess they never put the pigtails on sensors that was a free service item thing.
Lots of info here in the forum about it.
07-21-2024, 02:41 AM
#88
Member
I'm potentially picking up a C230K coupe next weekend. I'm hoping the maintenance is easier on my wallet and sanity than my w220 when I first bought it.
07-21-2024, 03:08 PM
#89
NO! Crap, I think if memory serves me correctly, oil coming from the cam sensors.
You will need to remove the entire wiring harness and soak it to get all the oil out.
I guess they never put the pigtails on sensors that was a free service item thing.
Lots of info here in the forum about it.
You will need to remove the entire wiring harness and soak it to get all the oil out.
I guess they never put the pigtails on sensors that was a free service item thing.
Lots of info here in the forum about it.
