2015 C300 reliability & maintenance




4-Cyl. Diesel are cheaper than twin-turbo V8... don't buy a C55 and discover it's expensive because of course it is a standing car.
G genuine German parts cost peanuts, cheaper than Toyota!
- FCP Euro
- Pelican parts
- mbusa

Last edited by CaliBenzDriver; Oct 23, 2023 at 01:48 PM.
That being said, I would not pick up a 2015 C300 in 2023. This gen of Mercedes C300 has been plagued with a "wrist pin" issue on these early 2015 models and I thankfully got mine fixed while it still was under warranty.
Poke around and see what other users say about their years but I would say getting a 2018 plus might be good if you want to keep the car around for a while.
Car is super fun to drive though! quite zippy and smooth for what it is and hope to keep it for as long as I can!
If you guys aren't DIY mechanics there is nothing to look forward to when it comes to servicing these. Nobody wants to touch them, I don't even trust normal mechanics to know how to change the o-rings properly on the filter housing/dipstick every time or do a transmission service or know how to clear service reminders.
Reliability is a hard 7. If you change your fluids filters plugs and fix general oil leaks that are completely unrelated to it being a Mercedes specifically it's a fantastic experience. If you are young and don't care it can rack up and give you a real hard time. The water pump, alternator, starter, radiator, are PRETTY expensive to replace despite not being any more difficult just because thats what we get paid to do it over normal cars. The brakes also kind of wear down fast since its semi metallic. Toyotas can go like 100k on the original rear pads sometimes.
Audi 2 liters are much better although yeah the timing guide and carbon buildup issues aren't great.
BMW is ok, the valve cover and oil cooler housing gaskets will hit you up for 2k together at around the 80k mark, and the oil pan gasket has financially totalled many a BMW. Also plastic water pump..
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