C32 AMG, C55 AMG (W203) 2001 - 2007

New injectors c55

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Old 10-21-2020, 09:30 AM
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Mercedes C30 amg, Mercedes C32 amg, Mercedes C55 amg
New injectors c55

Hellow,

My C55 has 191.000km and i'm wondering if new injectors are worth the purchase. They cost around 100€ a piece, so it will be 800€ to replace them.

Worth doing or leave it like it is? that car drives pretty well.

thx
Old 10-21-2020, 12:30 PM
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asdas
Why would it be worth replacing them if they aren't broken? If you're getting antsy to spend money on your car for the heck of it, getting them professionally cleaned and calibrated for your own peace of mind wouldn't be the worst expenditure. Most places will replace all the seals as well which often go bad by around your mileage.
Old 10-21-2020, 01:53 PM
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I'm not antsy to spend money but i want my Merc in perfect conditions. I replaced the injectors on my RS4 and it was worth it.

But if it's not necessarely, i wont do it;

thx for the answer.
Old 10-21-2020, 08:59 PM
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The RS4 is a different engine and has it's own issues and possible reasons why injector problems pop up, namely direct injection. You may have issues that would warrant a cleaning or replacement , but have you actually investigated? There is no way someone from out here in the ether can tell you whether you should replace the injectors before you do some investigating yourself, like what do your fuel trims look like? What fuel pressure do you hold and for how long? Do you see signs of leakage around the injector o-ring seals? Replacing anything before actual diagnosis is very close to if not the same thing as spending money for the heck of it, unless you make a lucky guess.

That being said, if you want a perfect running engine, and as I said before, at your mileage I wouldn't hesitate to have the injectors professionally cleaned, which runs about $200 for a set of 8 in the US. Maybe more or less wherever you are in the world that you speak in KM and Euros.


Old 11-02-2020, 07:16 AM
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I just tested my injectors and 1 of the 8 is not good. so i ordered a new on and new seelings.

thx for the info.
Old 02-03-2021, 02:16 PM
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W209 CLK55 - 2003
Originally Posted by capo_vendetta
I just tested my injectors and 1 of the 8 is not good. so i ordered a new on and new seelings.

thx for the info.
Interesting - let us know if you notice an improvement.

My W203 CLK55 has 125k miles on it. It didn’t feel like it had any major issues, but a bottle of Liqui Moly 5153 injector cleaner into the tank made a noticeable difference. Car feels smoother.
Old 02-04-2021, 07:59 AM
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I changed one of the 8 and i also changed my 8 ignition coils. the car doesn't goes faster but the engine runs more quietly.

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