2002 vs. 2004 C230 Coupe - PLEASE HELP ME CHOOSE!!
Are there other differences between the 2002 and the 2004 vehicles?
I'm considering buying an '02 with 78K miles, asking price $9000 privately, and an
'04 with 57K asking price $13,0000 from a small dealership.
What's the better buy? Why? Thanks in advance for your knowledge on the subject!




As for your actual question, I would go for an 02 coupe hands down. It was the last year of the M111 engine which has been in other MB models since the late 90's. So it has been refined through the years, and is bulletproof in the 02 coupe. There are a few minor issues, but the 04 coupe had the newer M271 engine which IMHO has quite a few issues.
Also, the 02 and 04 have the pre-facelift interior/exterior, so no difference there. Now if you were able to get your hands on an 05, thats a whole different story because quite a few things were changed (made better) in 05, so then the 05 would win. Anyway, between an 02 and 04, the 02 is a better choice according to me.
The only major issue the 02 coupes have is the coolant leaking into the engine oil via a harness. Read up about it on the forum, and make sure the particular car youre planning to buy doesnt have this issue. The thread discussing this issue will tell you what to look for.
Good luck.
Are there other differences between the 2002 and the 2004 vehicles?
I'm considering buying an '02 with 78K miles, asking price $9000 privately, and an
'04 with 57K asking price $13,0000 from a small dealership.
What's the better buy? Why? Thanks in advance for your knowledge on the subject!
As for your actual question, I would go for an 02 coupe hands down. It was the last year of the M111 engine which has been in other MB models since the late 90's. So it has been refined through the years, and is bulletproof in the 02 coupe. There are a few minor issues, but the 04 coupe had the newer M271 engine which IMHO has quite a few issues.
Also, the 02 and 04 have the pre-facelift interior/exterior, so no difference there. Now if you were able to get your hands on an 05, thats a whole different story because quite a few things were changed (made better) in 05, so then the 05 would win. Anyway, between an 02 and 04, the 02 is a better choice according to me.
The only major issue the 02 coupes have is the coolant leaking into the engine oil via a harness. Read up about it on the forum, and make sure the particular car youre planning to buy doesnt have this issue. The thread discussing this issue will tell you what to look for.
Good luck.




1. Oil leaking into the wiring harness from the cam sensor, which is
a service campaign, ie free. ANd
2. The dreaded Valeo radiator that was used on MANY MANY models, and configurations, not just the coupe.
That one you need to look for at the time of sale.
See the Tech Bulletin sticky on this forum.
As for your actual question, I would go for an 02 coupe hands down. It was the last year of the M111 engine which has been in other MB models since the late 90's. So it has been refined through the years, and is bulletproof in the 02 coupe. There are a few minor issues, but the 04 coupe had the newer M271 engine which IMHO has quite a few issues.
Also, the 02 and 04 have the pre-facelift interior/exterior, so no difference there. Now if you were able to get your hands on an 05, thats a whole different story because quite a few things were changed (made better) in 05, so then the 05 would win. Anyway, between an 02 and 04, the 02 is a better choice according to me.
The only major issue the 02 coupes have is the coolant leaking into the engine oil via a harness. Read up about it on the forum, and make sure the particular car youre planning to buy doesnt have this issue. The thread discussing this issue will tell you what to look for.
Good luck.




1. Oil leaking into the wiring harness from the cam sensor, which is
a service campaign, ie free. ANd
2. The dreaded Valeo radiator that was used on MANY MANY models, and configurations, not just the coupe.
That one you need to look for at the time of sale.
See the Tech Bulletin sticky on this forum.
Im going to attribute that brain fart to posting on the forum at 3am
And as mentioned, it has been arround for a while and was a solid engine.
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Also, the prices are way high on both as everyone else has already said.
The Best of Mercedes & AMG




I've seen a couple posts around here even from people with 2005's who still were having problems, so can't help but wonder if the so called head redesign is just more Mercedes bullsh*t.
So either go for any year C320 coupe if you can find it, but that means more maint costs, 12 spark plugs + coils and wires, and 2 cats to replace.
So, while I may seem biased, to me the 2002 just makes more sense IF the
cam sensor issue is resolved, no oil in the engine harness, no oil in the tranny harness, and no Valeo radiator.
Then I'd say OK. The engine itself is pretty bulletproof, with over 20 years of incremental enhancements built in.
Regarding:
"...the 2002 just makes more sense IF the
cam sensor issue is resolved, no oil in the engine harness, no oil in the tranny harness, and no Valeo radiator."
How can I tell if these problems exist? I imagine I need to take it to a mechanic?
ALSO, are the parts more expensive/harder to find for the M111 or the M271?
THANKS!!!
Yes, they are both automatic.
Are the parts more expensive/harder to find for the M111?
If it does have the Valeo radiator, is that a dealbreaker? Should I not buy it if it has it?
Thanks!!!
I paid 12000 for it and it only has 44k on it. I think(hope) I found something special. I just gave my Audi A4 to my daughter with 200k on it. I am hoping for the same.Good Luck
Bob
Better yet, as mentioned, see if you can find c320, more power and more potential in upgrades. In any case I'd make sure to get it in manual, way more fun on any c class.
I've seen a couple posts around here even from people with 2005's who still were having problems, so can't help but wonder if the so called head redesign is just more Mercedes bullsh*t.




Assuming the head issues is actually resolved, changing the chain every 60K miles might avoid issues with the chain stretching, jumping teeth, and causing the valves to deform.
111 double row chain, lasts forever.
As to Chryslers involvement, it's just that it was around that time, it seems like, the Mercedes took a turn from the "best engineered cars in the world" to the best italian cars in the world.
Meaning, poorly designed, and not caring about the long run, but sexy in the short run.
Sad but true, every engine since then has had serious flaws. Balance shaft gears etc.
6.3L has issues with soft cams...etc.
Last edited by C230 Sport Coup; Mar 5, 2012 at 01:43 PM.




Any dealer should be able to give you a run down of any and all repairs made
on the vehicle at the dealer.
Not likely it will have the valeo, but there are recent threads with pics of both, that should allow you to identify it.
IF it has it the thing to do would be analyze the tranny fluid, make sure there's not water/glycol in the tranny fluid.
As far as the noise and stuff, yeah that's pretty normal.
M111 is kinda rude 'n crude sounding with the hood open.
When you 1st start, it sounds like crap as it's heating the catalytic and then some valve opens 30-60 seconds in and they it calms down.
The exhaust sounds like a lawn mower, and finding a replacement muffer is difficult due to small space, it's a weird design (or just plain expensive 800-1000!), though you can occasionally find a used Remus on the forum for around 300.
I did.

Last edited by C230 Sport Coup; Mar 5, 2012 at 01:54 PM.




Parts for M111? What parts?
Haven't needed any!
Except oil, and oil and filters, and one hose.
No, not more expensive or hard to find.
There is one Achilles heel on the M111 is that the head gasket can leak around the #4 cylinder
and eventually requires replacement, but this usually doesn't happen till around 150K-200K miles.
Mine is leaking but per my mechanic, I just keep driving it, and putting a little coolant in now and then. Make sure there's no 'mayo' on the oil cap.
So far so good, I put a quart of 50/50 Xerex in every 1K miles or so.
http://www.kokes.net/slk/Engine_head...ead_remove.htm
Last edited by C230 Sport Coup; Mar 5, 2012 at 01:58 PM.
Chrysler didn't do the developing on Mercedes cars, it was more Chrysler used Mercedes parts.. So you can't blame them for anything wayward on Benz. The early 203s were so problematic because Mercedes saw fit not to real world endurance test them.. stuff like that can't be blamed on Chrysler. The M271 is not related to Chrysler, either.. I believe Glyn was able to explain that sufficiently when someone brought up it was possibly related to a 1.8L Mitsubishi engine.




The better mileage would be nice right now, and certainly the M271 excels in that. And I love the facelifted look. Ha, I spent enough trying to emulate it.

A 2005 M271 MANUAL 6 speed would be pretty good.
A manual would be better to keep it in the power range which is narrower than the
M111. The auto was shifting constantly to stay in the power band on hwy 17, which is a mountain freeway between sillycon valley and the ocean, ie Santa Cruz.
The M111 hits peak torque at like 2000 rpm, whereas the M271 it's like 4K.
Power really come in at around 4500 on the 271, but you guys know better eh?
I had a lot of loaners with M271. So I got a pretty good feel for it.
2005 is the way to go if not 2002. C320 coupe with 5 speed, probably ultimate coupe, but
impossible to find.
Chrysler didn't do the developing on Mercedes cars, it was more Chrysler used Mercedes parts.. So you can't blame them for anything wayward on Benz. The early 203s were so problematic because Mercedes saw fit not to real world endurance test them.. stuff like that can't be blamed on Chrysler. The M271 is not related to Chrysler, either.. I believe Glyn was able to explain that sufficiently when someone brought up it was possibly related to a 1.8L Mitsubishi engine.
Last edited by C230 Sport Coup; Mar 5, 2012 at 02:57 PM.
If you were a friend, I'd steer you away from buying either, honestly.
Also, I HAVE to have automatic because the traffic I deal with makes shifting agony.
It sounds like most of you prefer the M111. The private seller says his asking price of $9000 is firm. KBB says it's worth $6838. I'm going to have a mechanic look at it to verify it's not a lemon or due for mega-repair, then maybe offer 7000 if it checks out.
I'm surprising myself, though, because a 2004 with 20K fewer miles and 1.8L with more zippinesss and better gas mileage sounds much more like what I'm looking for than the 2002. Plus, I'm a chick and don't need my engine making noise and calling attention to me at the red light! And I'm unable to do any DIY, I have no intention of modifying it for more HP... But the 2002 I drove Saturday felt (and looked!) good. The only thing I didn't like was the noise it made when I stepped on the gas, whether driving or stationary. But since most of you guys think the 2002 is a better buy, I feel good about it.
I still need to test drive the 2004... I wish I could find a 2005.
THANK YOU for your time - I'm SO GRATEFUL for your knowledge!


