CLK 200 Timing Chain - Known Problem?

oldsteel

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have a CLK 200, 2008 vintage, with a serious problem. Now all of a sudden everyone is telling me - Oh yes, CLK 200, timing chain, yes that a Merc known problem! But is it? Here's the story ...

My wife has a CLK 200 convertible, Jan 2008, bought two and half years ago with 40k on the clock from a Merc dealer in Ireland, one owner from new. We love the car - it drives very well and she loves it. Now it is up at 70k miles.
It developed a rough idle last week and check light on, but ran OK at speed. I have a good mechanic next door, he ran off the code which said 'misfire on cylinder 1,2,3,4'. He removed the plugs to take a look, cleaned them up and replaced, fired up the engine at which point it locked up. He called in a Merc specialist who immediately said - we need to look at the timing chain. Sure enough, the top two cogs were badly worn, enough to allow the chain to slip. He said the hydraulic tensioner can take up so much slack, gets to the end of its travel and then the chain will eventually slip. Now, they also pointed to a lot of debris around the head, and suggested that earlier in its life the engine had been poorly maintained, either by the use of bad oil or left with oil very low for a long period. Needless to say since I have had the car it has been perfectly maintained with synthetic oil etc. at the designated service intervals. No real external signs of engine wear except high oil consumption, but mechanics said don't worry these engines have high consumption.

Now I am looking at a re-manufactured (NOT recon) engine. I would appreciate recommendations, I am going to Crewe Engines initially. But now I am hearing the stories - CLK 200 timing chain - oh yes that's a Mercedes design fault. Looking for a used engine - no-one will supply one because of the 'timing chain problem'. How come this is not common knowledge? If I had known in advance I would steered clear of the CLK 200. I had already been advised to look at chain replacement at around 85K, but at €1500 you wouldn't want to do it early. I guess I am just unlucky, but still ****ed off that if this is a bad engine that it is not flagged up in more places.
Interested in your comments - this will cost me dear and likely put me off Mercs for life.
 

ernieh

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Sadly, it is a common problem and it's not difficult to find many examples of timing chain problems on these 271 engines, many at around your mileage.

I had one that was just starting to rattle on cold starts at just under 70k, but got rid of it before it became an issue.

It is too late for yours now, but that rattle on a cold start is an often ignored early warning!

Ernie
 

LostKiwi

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Perhaps it's a little harsh to call it a common problem but it is a known problem. The issue isn't well documented outside MB forums for some reason but MB fans are well aware of the potential.
As with any car it's a bit if a lottery. Some will go through their entire life with no issues and some won't.
Sorry to hear you were caught up in it but at least once done you can rest easy knowing it won't happen again.
 
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Perhaps it's a little harsh to call it a common problem but it is a known problem. The issue isn't well documented outside MB forums for some reason but MB fans are well aware of the potential.
As with any car it's a bit if a lottery. Some will go through their entire life with no issues and some won't.
Sorry to hear you were caught up in it but at least once done you can rest easy knowing it won't happen again.

There is no mod as far as I know, extremely expensive Alistair, been hundreds on here.
 

LostKiwi

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I thought the issue was poor materials and that was largely sorted now?
I know that was the issue with the early 272 engines.
 

television

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I thought the issue was poor materials and that was largely sorted now?
I know that was the issue with the early 272 engines.

I do agree, I do not think that the timing gears have changed where the teeth wear away, Colin needs to answer this
 
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oldsteel

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Thanks all for the replies, I guess its just bad luck. I would hope the camshaft adjusters are improved, at £500 a pop they should be! I have decided to have the engine repaired and rebuilt where necessary at a specialist in Dublin, I reckon its worth it and the car should be good for another 100k miles at least, fingers crossed a good job gets done. The cost here in Ireland for that is about £3k, and I can knock off what it would have cost to get the timing chain done at the normal time. Will let you know how it goes.
 

Steve@Avantgarde

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I would do a compression test first. If all is ok then there is a company called M271.co.uk who will refurb the cam sprockets for £250 each, the chain and tensioner bits amount to about £500.

Surely thats is the cheapest option?
 

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I am also an M271 owner in the form of a CLK200 with 50000 miles on it and no sound of any problems . What does it cost to have the chain and tensioner done as a precaution as I expect to keep the car long term .
Anyone any ideas on price ?
 

Wighty

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Anyone know the price to replace the timing chain on the m271 clk200 as a precaution for the future ?
 

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I would do a compression test first. If all is ok then there is a company called M271.co.uk who will refurb the cam sprockets for £250 each, the chain and tensioner bits amount to about £500.

Surely thats is the cheapest option?

Yes, this is the best option, change the dodgy sprockets and chain for new versions and problem solved.
 
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oldsteel

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Beware - I was told that I would hear a rattling chain before it was time to change it. Not so, up until the rough idle the engine sounded as sweet as a nut. By that time the chain had already started to slip. Although the mechanic (merc trained) did say that he was convinced earlier in the cars life it had been poorly maintained, either bad oil had been used or it had been allowed to get too low. This is such a known problem businesses are being run on the back of it - M271.co.uk! But that's good news, keeps costs of maintenance down.
 

alexanderfoti

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Beware - I was told that I would hear a rattling chain before it was time to change it. Not so, up until the rough idle the engine sounded as sweet as a nut. By that time the chain had already started to slip. Although the mechanic (merc trained) did say that he was convinced earlier in the cars life it had been poorly maintained, either bad oil had been used or it had been allowed to get too low. This is such a known problem businesses are being run on the back of it - M271.co.uk! But that's good news, keeps costs of maintenance down.

Normally, when they start to go, you hear it for a second or two at cold startup.
 

Wighty

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Does anyone know what Indy chain replacement would cost on the M271 engine (clk200....2009) ?
 

alexanderfoti

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Does anyone know what Indy chain replacement would cost on the M271 engine (clk200....2009) ?

Approx £2K I think, best to ask the indies directly, as its likely to be different for each one.
 

Wighty

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Approx £2K I think, best to ask the indies directly, as its likely to be different for each one.

Wow , that almost makes me think change the car as it's probably worth 8k at the moment :(
 

alexanderfoti

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Wow , that almost makes me think change the car as it's probably worth 8k at the moment :(

It a fair amount of work, and the parts are quite expensive.
 

Steve@Avantgarde

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The timing chain isn't the cause of the problem, the camshaft sprockets are, they sieze, causing the chain to stretch, which is why you see teeth missing or worn on the sprockets also, so replacing the chain as a precaution does not guarantee you immunity from this issue!

To replace the sprockets and chains is circa £1700, use M271.co.uk and you can knock £500 off that cost.
 
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oldsteel

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Anyone know the price to replace the timing chain on the m271 clk200 as a precaution for the future ?

Well this is just ball park, in Ireland its around €1500, so allowing for exchange and lower UK prices, I would say £1000. Would be good to hear from someone who has had it done recently as a precaution. With lower cost parts, I had my Subaru done for €800, again would be about £500 in UK.
 
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oldsteel

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Quick update, my CLK is now with Howard Engineering in Dublin for the repair. I will let you know how it goes. Will take max 2 weeks.
 


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