[BGifford]

Posted on the A35 thread as well, but for completeness here it goes.
Finally, got the car back yesterday!! Power has been restored. No errors on the ECU unit either. Service manager was away so haven't yet gotten the full breakdown of what was replaced. But the cylinder and valve cover are new, the valve cover having a 05/22 date etched onto it.
Happy days😄

Hi, I have a 2019 A250, done 20000 miles and have been told I need a new cylinder head (quoted £4100). Problem started with a misfire in cylinder 2. Seen posts on forums with owners routing similar issues, when I put this to Mercedes, their answer was that people can post anything online and that there is no evidence! Do you have any jnfo you could pass me please to help me in my case to get Merc to cover the costs?

 

[Forrester]

Hi, I have a 2019 A250, done 20000 miles and have been told I need a new cylinder head (quoted £4100). Problem started with a misfire in cylinder 2. Seen posts on forums with owners routing similar issues, when I put this to Mercedes, their answer was that people can post anything online and that there is no evidence! Do you have any jnfo you could pass me please to help me in my case to get Merc to cover the costs?

MB are making it up. The M260 engine is the same basically as in the A35. There is a whole section on the blown cylinder heads on this site of A35s.

 

[brunoalves]

Hi, I have an a class 220 with the same faulty errors as you guys. Went to the dealership and they said I need a new cylinder head. The warranty as expired a few months ago and they're asking for +6k to fix it. Any tips on how to get them to cover the costs ?

 

[Debbiej]

Hi, I have an a class 220 with the same faulty errors as you guys. Went to the dealership and they said I need a new cylinder head. The warranty as expired a few months ago and they're asking for +6k to fix it. Any tips on how to get them to cover the costs ?

I know this is an old thread but did it ever get answered as I have exactly the same issue and MB still want me to contribute Thankyou

 

[alexcannas]

If you don't have extended warranty is unlikely you'll get them to contribute. You can try with your dealer and see what you get. They are saving money for the electrification investment and they've become incredibly stingy.

 

[Debbiej]

If you don't have extended warranty is unlikely you'll get them to contribute. You can try with your dealer and see what you get. They are saving money for the electrification investment and they've become incredibly stingy.

Thankyou I appreciate your reply …it seems this is a known issue and was hoping someone had had it resolved FOC by MB

 

[Rocketboy]

Hi all,

I have a W177 a250, 2019 model, 60k miles. I received an engine warning light, fault codes relating to misfire in cylinder two. Upon further investigation the MB garage have confirmed pressure in cylinder two in low via a compression test and that the fault is not related to spark plug, coil packs or alike since they have been switched around and the issue still persists in cylinder two.

After reading various forms, it seems this is leading to a cylinder head replacement which is of course an expensive job, and annoyingly a very common fault with the M260 engine. From what I have read, people have been quoted in the region of £4,000 - £5,000 to fix the issue. However, the MB garage have quoted me £4,100 just to strip the engine and investigate further, not even fix the issue. Is this common or does this seem outrageous? They have stated that I will have to pay for the full cost of repair following the strip, presumably totalling somewhere in the region of £9,000 - £10,000 adding two and two together. Furthermore, has anyone in the UK had any luck getting the issue fixed whilst being out of warranty, I have seen MB in Canada and the US have extended the warranty for this particular engine part, but not in the UK seemingly so…

 

[alexcannas]

What is there to investigate for £4000? Is a well known issue. Someone on this forum fixed the issue by just replacing the valves. Mercedes replace the whole cylinder head, because the problem seems to stem from excessive lateral play on the exhaust valves (latest NHTSA filings). So presumably, if you replace just the valves you may get the same problem later on.

Perhaps consider an independent?

 

[Rocketboy]

In all honesty, it does not seem correct; this is what they have stated. The £4,000 is for "Advise cylinder head to be removed to inspect further". They have said the repair costs once a fault is discovered within the engine will be in addition to the £4,000. So essentially, they want me to pay £4,000 just to take the engine apart and be left with no repair for that cost; it seems this is unlike what anyone else has mentioned; others have said they paid this cost to resolve the problem in its entirety, not just inspect it! They have not mentioned that it is a known fault and did not confirm any knowledge of this when I mentioned it to them.

 

[max_err]

Hi buddy your best bet to confirm that valve seats have burnt out is to ask your mb dealer to carry out cylinder leak test this will show if the lack of compression is being caused by the gasses leaking past the valves and if so intake or exhaust valves could be identifier normally is around 2 hours labor I would be happy to do it for you if you want to book it in at mercedes benz Slough At least you will be alot less money out of pocket rather then removing to inspect

 

[A220banger]

I own a mercedes A220 69 plate

2.0 petrol litre engine.

A amber engine light appears and stop start logo in white appears. The car judders and shakes on acceleration. Exhaust sounds rough and so does the engine. If I turn the engine off and on it’s okay runs fine. But the problem comes along when I drive roughly 30 miles mainly on a long run. Also it takes longer than usual to start on a cold morning. But starts regardless
Local garages has put it onto his machine and done the following:
Misfire on cylinder 3

Had a coil pack

Spark plug replaced

Injector replaced
Same problem.
Can you please advise me on what I need to do to resolve this situation please.
Thanks

 

[A220banger]

I own a mercedes A220 69 plate

2.0 petrol litre engine.

A amber engine light appears and stop start logo in white appears. The car judders and shakes on acceleration. Exhaust sounds rough and so does the engine. If I turn the engine off and on it’s okay runs fine. But the problem comes along when I drive roughly 30 miles mainly on a long run. Also it takes longer than usual to start on a cold morning. But starts regardless
Local garages has put it onto his machine and done the following:
Misfire on cylinder 3

Had a coil pack

Spark plug replaced

Injector replaced
Same problem.
Can you please advise me on what I need to do to resolve this situation please.
Thanks

The vibration is harsh and comes from the rear of the car

 

[Forrester]

Put your codes into copilot. One of them indicates a cylinder 2 misfire.

 

[alexcannas]

Have them do a compression test. You'll likely end up needing a new cylinder head like the A35s

 

[veeeight]

I own a mercedes A220 69 plate

2.0 petrol litre engine.

A amber engine light appears and stop start logo in white appears. The car judders and shakes on acceleration. Exhaust sounds rough and so does the engine. If I turn the engine off and on it’s okay runs fine. But the problem comes along when I drive roughly 30 miles mainly on a long run. Also it takes longer than usual to start on a cold morning. But starts regardless
Local garages has put it onto his machine and done the following:
Misfire on cylinder 3

Had a coil pack

Spark plug replaced

Injector replaced
Same problem.
Can you please advise me on what I need to do to resolve this situation please.
Thanks

If you’re lucky, it’s a faulty rail pressure sensor, ask the dealer to look up TIPS
LI07.70-P-078047

If you’re unlucky, the valve/valve seat is damaged, and you’ll need to replace the cylinder head or find an Indy that is willing to repair the valve/seat.

 

[A220banger]

Thanks for your reply, the problem goes away if I turn the engine off and back on. Would it still be a cyclinder head as I think that would be a major issue. It feels electrical

 

[alexcannas]

Thanks for your reply, the problem goes away if I turn the engine off and back on. Would it still be a cyclinder head as I think that would be a major issue. It feels electrical

The short answer is yes, it can be the cylinder head. The ECU needs to register a set number of continuous misfires before it illuminates the engine lamp and sets the engine to limp home mode.

Mine did the same. When I turned off the engine the engine light would go off and come back on after a few minutes of driving. However, when I hooked up the diagnostics I could see there were misfires even with engine light off.

 

[A220banger]

Thanks for your help and I appreciate everybody else’s input on this forum. Another expense I could do without lol. Anybody have a rough estimate how much the replacement cycinder head would cost? Thanks

 

[Forrester]

Thanks for your help and I appreciate everybody else’s input on this forum. Another expense I could do without lol. Anybody have a rough estimate how much the replacement cycinder head would cost? Thanks

Going by the A35 thread you’re looking at a very ballpark £5k. But you should keep trying MB for a contribution at the very least.

 

[Paul C]

My 2021 A250 has misfire on cyl2 and like others change over everything to cylinder 3 and still the fault is on cyl 2
Merc dealer looked at this 2hrs labour and need new head only just done 100 thousand miles always serviced by them and no chance of a contribution to the 5k expense. This can’t be right there is obviously an issue.