Replace sparkplugs at 5 year mark with 27k miles?
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 34
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From: Bay Area, CA
2019 E300
Replace sparkplugs at 5 year mark with 27k miles?
Hello, does anyone know if the spark plug replacement should be done at the 5 year mark if I'm only at 27k miles so far? I saw on the service schedule that they are marked for replacement at the 5 year / 50k mile mark, but I'm debating if I should wait until I hit 50k. If yes, does anyone have a link or part number where I can order them? I'm going to an independent shop to perform my next A3 service and might try to replace the spark plugs myself. Thanks in advance!
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From: Tennessee
W214 E450
I would replace them now. Plugs can corode over time and cause poor detonation in the combustion chamber. Low mileage may even make it worse since it's sitting for longer periods of time and may not be driven to normal operating temperature on short trips. Low mileage can be considered abusive and harsh conditions rather than the other way around.
You should be able to call any dealership parts department and get the PN for your specific car. Good luck!
You should be able to call any dealership parts department and get the PN for your specific car. Good luck!
Last edited by L1Wolf; Apr 20, 2025 at 01:41 PM.
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Hello, does anyone know if the spark plug replacement should be done at the 5 year mark if I'm only at 27k miles so far? I saw on the service schedule that they are marked for replacement at the 5 year / 50k mile mark, but I'm debating if I should wait until I hit 50k. If yes, does anyone have a link or part number where I can order them? I'm going to an independent shop to perform my next A3 service and might try to replace the spark plugs myself. Thanks in advance!
I would replace them now. Plugs can corode over time and cause poor detonation in the combustion chamber. Low mileage may even make it worse since it's sitting for longer periods of time and may not be driven to normal operating temperature on short trips. Low mileage can be considered abusive and harsh conditions rather than the other way around.
You should be able to call any dealership parts department and get the PN for your specific car. Good luck!
You should be able to call any dealership parts department and get the PN for your specific car. Good luck!
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 34
Likes: 2
From: Bay Area, CA
2019 E300
Thanks guys, I'm going to buy the tools and replace them myself. Got a quote for $350 in Northern California at an independent shop so I'll save ~$300. Looks like the MB part number for the spark plugs is 2701590700. Does anyone happen to have the WIS documents for both removing the ignition coils and spark plugs?
Looking at my engine number of 27492031781871 that I got from a VIN Decoder, I believe I should be trying to find WIS documents that are for "Engine 274.9 in model 213"?
Looking at my engine number of 27492031781871 that I got from a VIN Decoder, I believe I should be trying to find WIS documents that are for "Engine 274.9 in model 213"?
Last edited by ryuan1688; Apr 20, 2025 at 06:56 PM.
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From: Colorado
G550
I'm at 25K miles at 5.5 years. My driving is a couple trips a week, usually at least 50 miles r/t at highway speed. No indications of abnormal ignition, either in performance, fuel consumption or OBD scans. I plan to change plugs at 40K unless something changes. Of course changing plugs sooner does no harm. Will the OP post some pics of the plugs he removes? We'd all appreciate seeing how they look. I'll do the same when I do mine.
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From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
Hello, does anyone know if the spark plug replacement should be done at the 5 year mark if I'm only at 27k miles so far? I saw on the service schedule that they are marked for replacement at the 5 year / 50k mile mark, but I'm debating if I should wait until I hit 50k. If yes, does anyone have a link or part number where I can order them? I'm going to an independent shop to perform my next A3 service and might try to replace the spark plugs myself. Thanks in advance!
Keep in mind that most other cars the recommended interval is 100,000 miles. MB is half that and at 27,000 miles half that again.
You will find on this forum many who adhere to the MB schedule of time vs. mileage as if it was religious doctrine which by not following your car goes to car "hell".
I prefer a more common sense approach.
Just my $.02.
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From: Colorado
G550
I changed out my Jeep JK's plugs last summer at 60K miles. Three of the six plugs (Pentastar 3.6L engine) had electrodes badly burned away. No way these were a 100K mile wear item. I'll do them again at 100K miles.
But for the few who remember doing 5,000 mile "tune-ups" -- replacing the points and condenser, along with the rotor (and sometimes the distributor cap), and then setting the timing and dwell -- getting 10K miles from a set of plugs ($0.87/ea. when not on sale) was about what you could expect.
But for the few who remember doing 5,000 mile "tune-ups" -- replacing the points and condenser, along with the rotor (and sometimes the distributor cap), and then setting the timing and dwell -- getting 10K miles from a set of plugs ($0.87/ea. when not on sale) was about what you could expect.
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Joined: May 2018
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From: Long Island, NY
2019 E 450, 2016 E350 4matic (retired), 2018 Ford Edge Sport, 2008 Porsche Boxster
I changed out my Jeep JK's plugs last summer at 60K miles. Three of the six plugs (Pentastar 3.6L engine) had electrodes badly burned away. No way these were a 100K mile wear item. I'll do them again at 100K miles.
But for the few who remember doing 5,000 mile "tune-ups" -- replacing the points and condenser, along with the rotor (and sometimes the distributor cap), and then setting the timing and dwell -- getting 10K miles from a set of plugs ($0.87/ea. when not on sale) was about what you could expect.
But for the few who remember doing 5,000 mile "tune-ups" -- replacing the points and condenser, along with the rotor (and sometimes the distributor cap), and then setting the timing and dwell -- getting 10K miles from a set of plugs ($0.87/ea. when not on sale) was about what you could expect.
I also remember taking out plugs, cleaning and re-gapping and replacing. In those days didn't have the money to constantly be replacing - reusing was the order of the day!
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From: Colorado
G550
Yes I remember doing all that, but I remember changing points and rotor every 10K miles not every 5K, but it was so long ago, my memory may not be correct.
I also remember taking out plugs, cleaning and re-gapping and replacing. In those days didn't have the money to constantly be replacing - reusing was the order of the day!
I also remember taking out plugs, cleaning and re-gapping and replacing. In those days didn't have the money to constantly be replacing - reusing was the order of the day!
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From: Suburban Maryland
2023 E 450 Sedan. 2018 GLC 300. 2013 E 350 Coupe (retired)
For plugs it is miles not time. They energize more than once a cycle, hence the need for replacement every 40 or 50 thousand miles. Less miles, less firing, less wear. Here you can economics, unless you worry that the warranty ninnies will get you.
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I heard MB plugs fires 5 times? Is that true?
Thread Starter
Junior Member
Joined: Sep 2019
Posts: 34
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From: Bay Area, CA
2019 E300
I'm at 25K miles at 5.5 years. My driving is a couple trips a week, usually at least 50 miles r/t at highway speed. No indications of abnormal ignition, either in performance, fuel consumption or OBD scans. I plan to change plugs at 40K unless something changes. Of course changing plugs sooner does no harm. Will the OP post some pics of the plugs he removes? We'd all appreciate seeing how they look. I'll do the same when I do mine.
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Joined: Oct 2019
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From: Colorado
G550
