MBWorld.org Forums - C-Class (W203) https://mbworld.org/forums/ 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe en Wed, 27 May 2026 09:33:06 GMT vBulletin 60 https://mbworld.org/forums/images/misc/rss.jpg MBWorld.org Forums - C-Class (W203) https://mbworld.org/forums/ Help with doing a smoke test https://mbworld.org/forums/c-class-w203/927859-help-doing-smoke-test.html Sun, 24 May 2026 21:44:47 GMT Hi, newbie here, have been trying to catch up on repairs to my car, not the first owner but I have had my vehicle since 2017, it is a 2005 c230 kompressor, I’m just wondering if anyone has a picture... Hi, newbie here, have been trying to catch up on repairs to my car, not the first owner but I have had my vehicle since 2017, it is a 2005 c230 kompressor, I’m just wondering if anyone has a picture of where I am supposed to put a smoke machine to test vacuum hoses for any leaks. I’ve been searching the web with no luck for this car model information with pictures for reference anyway…. Thank you in advance for any help. ]]> C-Class (W203) Nikitag https://mbworld.org/forums/c-class-w203/927859-help-doing-smoke-test.html HOW TO: Fix Cloudy / Yellowed Headlights https://mbworld.org/forums/c-class-w203/927837-how-fix-cloudy-yellowed-headlights.html Sun, 24 May 2026 11:12:06 GMT ​HI all,



This is my latest 'How To' video, in this episode I show you how to completely transform your Yellow/Cloudy Headlights making them look brand new again!



]]> C-Class (W203) KILLERHERTZ https://mbworld.org/forums/c-class-w203/927837-how-fix-cloudy-yellowed-headlights.html 2005 CLK 500 Cold Air Intake https://mbworld.org/forums/c-class-w203/927802-2005-clk-500-cold-air-intake.html Sat, 23 May 2026 02:59:16 GMT Good evening, I am just curious if anyone has tried to put a cold air intake in their CLK 500. If so, where did you get the kit, and how much pain was it to put it in and was it worth it? Good evening,

I am just curious if anyone has tried to put a cold air intake in their CLK 500. If so, where did you get the kit, and how much pain was it to put it in and was it worth it? ]]> C-Class (W203) Magnesium77 https://mbworld.org/forums/c-class-w203/927802-2005-clk-500-cold-air-intake.html Searching for information regarding catalytic converter delete https://mbworld.org/forums/c-class-w203/927444-searching-information-regarding-catalytic-converter-delete.html Tue, 12 May 2026 23:56:47 GMT The cat on my car just started making an awful rattling noise today and when I shake it I can hear something rolling around inside. As its the cat that has been with the car for the last 160k I... The cat on my car just started making an awful rattling noise today and when I shake it I can hear something rolling around inside. As its the cat that has been with the car for the last 160k I wouldnt be surprised that its dead now. (also got a pending P0420 code when I plugged in the reader, which goes along with me thinking the cat is falling apart) Im not planning on leaving the car catless permanently but because of the situation im in right now (will be moving for a summer internship shortly) I would like to pull out the cat and clear it out so I dont have that rattling noise/loose bits of the honeycomb blocking up my exhaust. This would just be until I move in to my internship apartment and can get a replacement ordered and installed. I know people will say its a bad idea and whatnot but the way I see it I either have no cat or I have chunks of cat rattling around my exhaust system. Is there a way i can prevent the code that will show up when the downstream O2 sensor sees that there isnt a cat? I know that on some cars you can buy a spacer to get the sensor out of the stream but i dont know if theres such a thing for this car. If there isnt how much would I have to have the sensor offset for it to read the levels it needs to think the cat is still there? Any input is appreciated. (I have the 2002 C230 coupe with the M111 engine and only one cat if that helps) ]]> C-Class (W203) an6dk https://mbworld.org/forums/c-class-w203/927444-searching-information-regarding-catalytic-converter-delete.html Vacuum pump https://mbworld.org/forums/c-class-w203/927391-vacuum-pump.html Mon, 11 May 2026 14:26:24 GMT Hi and hello, so I got a new engine in my w203 c280 4matic and on trying to fix the vaccum pump I find it's doesn't have the slit for the pump to latch unto and I'm confused as to what to do. I will attach images of that it looks like and what another looks like. Any help is very welcome, thank you
This is what the new one looks like
This is what the new one looks like
What it should look like.
What it should look like. ]]> C-Class (W203) Kwameskillz https://mbworld.org/forums/c-class-w203/927391-vacuum-pump.html questions about headlights, inter coolers https://mbworld.org/forums/c-class-w203/927341-questions-about-headlights-inter-coolers.html Sun, 10 May 2026 01:05:24 GMT In the process of pulling the bumper off to get to a wiper fluid bottle that was broken I noticed my headlights are completely cooked (stuff rattling around inside and wiring on the inside completely... In the process of pulling the bumper off to get to a wiper fluid bottle that was broken I noticed my headlights are completely cooked (stuff rattling around inside and wiring on the inside completely turned to dust). Ill be getting new ones but Im not able to tell from the pictures on the new ones if they include the little rubber gasket thing (picture included). If anyone knows whether or not new headlights would come with that bit/a brand that does include them/where i could get that part separately that would be great. Another thing i noticed is that my intercooler is absolutely full of crap from the road. Am i able to take that out without pulling the whole radiator? I cant find any documentation on removing just the inter cooler anywhere online and dont have acess to my computer with WIS on it at the moment. Thanks for any tips that may come my way as always. I appreciate the ongoing help in keeping my car alive :)

]]> C-Class (W203) an6dk https://mbworld.org/forums/c-class-w203/927341-questions-about-headlights-inter-coolers.html Parts are Discontinued. https://mbworld.org/forums/c-class-w203/927191-parts-discontinued.html Tue, 05 May 2026 22:07:59 GMT Does anyone know where I can find a new top "ledge" drip molding - Part number 203-690-69-62-9074 - I've exhausted the usual resources including working with the Classic Center. If anyone has a new one, or know where I can locate one for sale, I'd appreciate it.

Thank you ]]> C-Class (W203) chicago_fog https://mbworld.org/forums/c-class-w203/927191-parts-discontinued.html New owner m111k https://mbworld.org/forums/c-class-w203/927148-new-owner-m111k.html Mon, 04 May 2026 23:13:28 GMT I just got a c200 kompressor sedan that has had a bifuel kit installed to run on GPL/LPG ( very common in my country for gas engine cars that drink alot) I want to do some things to make a fun daily... I just got a c200 kompressor sedan that has had a bifuel kit installed to run on GPL/LPG ( very common in my country for gas engine cars that drink alot)
I want to do some things to make a fun daily that i can slide around every once in a while. Just a valved exhaust, coilovers or springs, and a intake.
I need to take care of my headlights, should i go aftermarket or new lenses?
A sound system upgrade will be the first thing i do. Just basic to enjoy on the daily, what do you guys recomend for this platform? i dont understand anything about eletronics and sound systems
Also... does running GPL/LPG change the sound of the exhaust at all? ]]> C-Class (W203) TOMAS PF https://mbworld.org/forums/c-class-w203/927148-new-owner-m111k.html Unknown obd code https://mbworld.org/forums/c-class-w203/927026-unknown-obd-code.html Fri, 01 May 2026 10:27:33 GMT I ran an ECU diagnostic on the VDO instrument panel of my C180 Classic and got an unknown code 9124. I could erase it. Is there a way to decipher it ? I ran an ECU diagnostic on the VDO instrument panel of my C180 Classic and got an unknown code 9124.
I could erase it.
Is there a way to decipher it ?
]]> C-Class (W203) the_edge123 https://mbworld.org/forums/c-class-w203/927026-unknown-obd-code.html