SL 55 amg spark plugs

[davidlj]

Hi
Think I need to replace my plugs as last changed 8 years ago, but only 25,000 miles since changed.
Seem to be 3 options Bosch Platin or NGK Iridium IX or IFR6A.
Any views on which is best
Thanks for any help Best David

 

[LostKiwi]

I always use NGK in my cars.

 

[davidlj]

I always use NGK in my cars.

many thanks for your help ,any preference between the 2 different NGK options
Thanks

 

[ajlsl600]

unlikely to go far wrong with benz recommendation ,buy elsewhere.. yr hand book will provide that info, least it used to.

 

[davidlj]

unlikely to go far wrong with benz recommendation ,buy elsewhere.. yr hand book will provide that info, least it used to.

Thanks

 

[ajlsl600]

Thanks

hope yr sorted , on my w166 they have not bothered with a proper owner manual , i have to revert to a tedious to use electronic version a real bore ,hope you can avoid that .

 

[bembo449]

do they need changing at 25k ? the fancy NGK ones in my vxr are good for 40k

 

[davidlj]

hope yr sorted , on my w166 they have not bothered with a proper owner

do they need changing at 25k ? the fancy NGK ones in my vxr are good for 40k

More worried about the 8 year time and getting them out than the actual miles
manual , i have to revert to a tedious to use electronic version a real bore ,hope you can avoid that .

 

[bembo449]

they will come out easy pal and I bet they look barely worn

 

[davidlj]

they will come out easy pal and I bet they look barely worn

good to hear I will get the garage to take one out and see how easy it comes out and the check condition
Thanks again for your advice

 

[Blobcat]

good to hear I will get the garage to take one out and see how easy it comes out and the check condition
Thanks again for your advice

I’d change them regardless, I change my plugs in my motorbike every 2 years regardless of mileage as I’ve found they misfire at high RPM after 2 years. Mileage is generally less than 1,000 miles per year...

You have an AMG show it some love

 

[LostKiwi]

I’d change them regardless, I change my plugs in my motorbike every 2 years regardless of mileage as I’ve found they misfire at high RPM after 2 years. Mileage is generally less than 1,000 miles per year...

You have an AMG show it some love

16 plugs is a whole lot of love for iridium ones!

 

[ajlsl600]

16 plugs is a whole lot of love for iridium ones!

you aint wrong. i would have them out ,look em over every few yrs and if looking ok put back until at least the recommended km/miles buy a few each yr until you have all. they aint cheap...

 

[DaveE320CDI]

Check out Opie oils for the NGK plugs put in your reg and it will tell you the right ones
https://www.opieoils.co.uk/?gclid=C...vUVWtTDngHs9zwMAoPQW6eaQ_vTZRiwRoCWNoQAvD_BwE

 

[davidlj]

Check out Opie oils for the NGK plugs put in your reg and it will tell you the right ones
https://www.opieoils.co.uk/?gclid=C...vUVWtTDngHs9zwMAoPQW6eaQ_vTZRiwRoCWNoQAvD_BwE

thanks Dave

 

[AMGeed]

I had my 55k plugs changed by Cole at MBS in 2018 and they were a devil to remove. I would certainly renew them at the recommended time span of 4 yearly (or 50k miles)

I got the plugs from an ebay retailer for around £100 for 16 plugs and used the NGK IFR6A plugs.

 

[davidlj]

I had my 55k plugs changed by Cole at MBS in 2018 and they were a devil to remove. I would certainly renew them at the recommended time span of 4 yearly (or 50k miles)

I got the plugs from an ebay retailer for around £100 for 16 plugs and used the NGK IFR6A plugs.

many thanks for your comments ,yes, last thing wanted is a problem removing & confirming IFR6A plugs

 

[AMGeed]

^ If they are really stubborn you may have to refit all the plugs and coil packs, start the engine up and get some heat in them before they'll come out. Then replace a pair of plugs at a time and refit the coil pack so you can restart anytime to get more heat in them. My indy took a couple o hours of hard work to remove them. He did one bank at a time. If one snaps, it can be an engine out job to get the plug out. Just a warning to be careful.