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2015 C 300 Spark Plugs at 50K miles?

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2015 C 300 Spark Plugs at 50K miles?

 
Old 11-07-2018, 11:54 PM
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2015 C 300
2015 C 300 Spark Plugs at 50K miles?

Just had the 50K service A done on my 2015 C300.
Dealer recommended changing spark plugs for $550. When I pushed for details, the breakdown was $100 for 4 spark plugs ( Q-4-15-0038) and 2.5 hrs of labor.

Has anyone else replaced the plugs at 50K miles and what was the cost? I thought spark plugs had a much longer life than 50K miles..
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Old 11-08-2018, 03:48 AM
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I haven't done it, my car is only at 7K miles, but at that price you need to find an indy to do these jobs. It'll be far cheaper.
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Old 11-08-2018, 03:13 PM
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2015 C 300 4MATIC
There's no way it take 2.5 hrs to do spark plugs on a inline 4. Take it to a indie or have a friend do it.
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Old 11-08-2018, 06:31 PM
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that's about right. I paid 840$ for 50k service with spark plugs replaced at dealer.
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Old 11-09-2018, 08:59 AM
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I purchased OEM spark plugs online, bought the torque wrench and other tools, and it took me about 30-40 mins to do on my own. Altogether, it was prob $150 I spent. Iím not tech savvy and definitely not handy when it comes to Dyi for cars, and have never changed a spark plug omg any car, and I was easily able to do it. Research / watch videos / review the WIS to see if youíre comfortsble doing it on your own
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Old 11-09-2018, 01:22 PM
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2015 C 300 4MATIC
Originally Posted by Elbandito View Post
I purchased OEM spark plugs online, bought the torque wrench and other tools, and it took me about 30-40 mins to do on my own. Altogether, it was prob $150 I spent. Iím not tech savvy and definitely not handy when it comes to Dyi for cars, and have never changed a spark plug omg any car, and I was easily able to do it. Research / watch videos / review the WIS to see if youíre comfortsble doing it on your own
Completely agree. Changing spark plugs on an inline 4 is as straight forward as it gets. V6s on the other hand can be tricky and it's worth it sometimes to pay a shop to do it. The torque spec for the C300 is 23nm for those wondering.
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Old 11-14-2018, 08:55 PM
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Did the plugs look like they needed to be changed at 50,000 miles?
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Old 01-12-2019, 12:45 PM
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Im also in the bay area may I ask which MB dealer, quotes I been getting is like $1200-$1400 I know thats high. thanks
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Old 01-12-2019, 01:01 PM
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Originally Posted by alkam2 View Post
Im also in the bay area may I ask which MB dealer, quotes I been getting is like $1200-$1400 I know thats high. thanks
Mercedes of Walnut Creek, they actually have a printout and on the computer showing 50k service with spark plug replacement, 846$. so there' no BS.
on my work order sheet, spark plugs part and labor is 452$, very reasonable.
i have went to this Fremont dealer, this adviser just pull some numbers out of his ***, he said 50k service is 1000$ +, spark plug is 600$ +.
for future reference, i just done 60k service on my 2016 C450 with transmission oil change, 1248$.

look at other bayarea website, this other dealer have a service special, spend 800$ - 1099$, get 128$ off.
bring this coupon or mention it to them, they will match the coupon.
My adviser is Carlos Ramos, tell them Mr. Li send you. he'll know.
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Old 01-12-2019, 02:18 PM
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Thanks for the info. Walnut Creek is actually where both my brother and I bought our C300 on the same day. I live in Fremont thats why we went to the dealer there and got that high full retail price.
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Old 01-12-2019, 05:34 PM
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I replaced mine at 58K. Didn't go to MB dealership. I'm also in the Bay Area.

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Old 01-12-2019, 07:30 PM
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2015 C300 4matic
Spark plugs

Originally Posted by Sanjayna View Post
Just had the 50K service A done on my 2015 C300.
Dealer recommended changing spark plugs for $550. When I pushed for details, the breakdown was $100 for 4 spark plugs ( Q-4-15-0038) and 2.5 hrs of labor.

Has anyone else replaced the plugs at 50K miles and what was the cost? I thought spark plugs had a much longer life than 50K miles..
considering I have prepaid maintenance, will that cover them getting replaced? Iím only at 45k miles but because of time, this should be my 50k mile service. Car had 29k when I bought it so dealer shouldíve done 30k, I just did a maintenance during the summer. So....
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Old 01-13-2019, 01:12 PM
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Probably would not hurt. Engines running under boost tend to go through them quicker. What does the manual say?
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Old 01-13-2019, 09:04 PM
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2015 C300 4matic
Spark plugs

Originally Posted by Crankster View Post
Probably would not hurt. Engines running under boost tend to go through them quicker. What does the manual say?
dunnonwhst the manual says, I go online and itís a generic maintenance chart
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Old 01-13-2019, 11:48 PM
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To the post on prepaid maintenance - yes - that covers spark plug job...
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Old 01-14-2019, 05:38 PM
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Thumbs up Support your local independent shop!

With my first MB (The 2007 C280 pictured in my Signature), I went to an independent shop after my first "A" service. That "A" service was at the dealer where I bought the car. At the time, they were the only dealer in the western suburbs of Boston. They treated me like I was a rich customer of a private bank, but they did things like charge me $7, plus a labor charge for "refilling" a windshield wiper fluid reservoir that was almost completely full. My present 2015 C300 (bought at a new dealership competitor of the first dealer) came with two years worth of services as part of the purchase agreement.

With those "free" "A" and "B" services out of the way, I have gone back to my independent shop. It doesn't hurt that the shop is almost in walking distance of my home and that the manager is the President of the local chapter of the Mercedes-Benz Club of America (and a financial supporter of the club). Remember, these shops exist because the dealerships CAN'T repair the "B.C." (Before Computers) vehicles. They don't want to spend money on real mechanics. They employ only "technicians," who replace Part A when the on-board computer throws Code X.
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Old 01-17-2019, 05:20 PM
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At what mileage is it recommended to change spark plugs on a C400? Thanks.
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Old 02-26-2019, 01:45 PM
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currently have my '16 C450 in for 50k mile service. They also recommended replacing the spark plugs and quoted me $700 for that. They said the engine filters would be another $185 on top of the "A" service which does not include this? The C450 does have 2 Engine filters, but c'mon.
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Old 02-26-2019, 03:42 PM
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'15 C400 and '15 ML350
https://www.mbusa.com/vcm/MB/Digital...nce_manual.pdf

C400 and other 3.0TT motors should be at 46k miles. I wouldn't push too much past mileage, the new mercedes motors uses a waste spark fire where the plug fires up to 5 times per piston stroke which puts a lot more use on the plugs (and coils) than say a toyota w/100k mile interval. Even the ML350 has the same interval, and its not forced induction.
Get the OEM plugs online and DIY. Not much to it on the W205 I4/V6 assuming you have done plugs on other cars before. C63 might be more PITA, not sure how far back the last 2 plugs are.
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Old 02-27-2019, 03:12 PM
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2015 C300 Sport
I get the occasional stumble on restart from the auto-stop system. Think plugs could make a difference on that? C300 @ ~36k miles, 99% of the time filled with Shell or Exxon 93.
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Old 02-28-2019, 11:24 AM
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$850 to replace spark plugs!!
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Old 03-01-2019, 12:11 PM
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I did spark plugs on this car. Pretty easy. Nothing special, just make sure you use some anti seize on the new plugs and all should be good. oh and check the gap on the new plugs as well. I think I will do the plugs every year or 2 just because it felt a little better after I did them and the fuel economy may have went up and it was so easy...
$100 would be a lot for a spark plug change on this car, anything more is just absurd.
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