My coupe is 2018 but i bought new in 2020 from merz.
but milage still below 35,000km. very low usage. love it

but it already 8 years old even though i only use it for 6 yrs. all the while service at merz center, only change engine oil/ filters. recently after warranty i change spark plug. the most expensive parts so far was replacing cooling coil. also fuel pressure pump. replace gear oil front and rear, and the v belt.

is there any more parts i shoukd be aware need to change like wear and tear of plastic component that need to replace because of aging etc
anyone can advice what part that i need to replace as car driven by missus. do not want to get sudden call when car stranded on the highway.😁

 

Is it 4matic? If so, front and rear diff fluid as well as transfer case. Although the mileage is a little low to have those needed.

 

I have a 2018 C300 Cabriolet with 42k miles. For me, it was a recent purchase. Like you, low miles, but the age part was in my head as well. Personally, I lean in the over maintain if its something you plan to keep long term.

Not needed based on miles, but perhaps age and usage: If 4matic, I would do what the individual above recommended, if a RWD like mine, I would still do the rear diff fluid. Given that the turbo does produce heat, coolant. Mine showed some slight discolor, so I was glad to have had mine changed out. Both of these are good long term refresh items. Along the same lines, you could always have a full transmission service done: drop the pan, change transmission filter, new fluid. If I were to rotate these in maybe every 6 months, I would probably go Coolant, then Differential fluids and then transmission fluids.

You mention it has had normal service at MB dealerships. Did that include the alternating A and B service schedule, including changing the cabin and engine filters and every 2 years brake fluid services? If not, attend to that. If you kept up on cycle with all of that, then good to go there.

Items to consider based on age:
* Age of main battery and Auxilary battery or capacitor (whatever that Auxilary item is)? Test & potential replace.
* How’s the serpentine belt look? Any signs of cracking & age, replace.
* Have camshaft magnets checked for oil wicking. None -good. Starting? Have pigtails installed to prevent potential ECU oil damage. Can happen with these with time.
* Probably goes without saying, but brake pads condition/thickness, tire tread health, depth.

Anyhow, I just did a very in depth refresh for our cabriolet. Nothing was off aside from the slight discoloration in the coolant fluid. However, I have great peace of mind moving forward with the next 50-60k miles knowing she is as good as new again. Hope yours stays great and running perfect for the misses.

 

Service on low mileage cars is due every 12 months, so I assume you followed the regular service schedule. On a regular C Class, there isn't really much to service besides engines oil. Spark plugs after 5 years is probably the biggest one. Don't recall if the transmission is ever supposed to be serviced on a non-AMG. My C63S Coupe is also low mileage. I'm doing about 4k per year, so service every 12 months. In my case transmission and rear differentials are service items that are due every few A or B services.

In contrast, my wife's car is a 2004 VW Beetle. Still runs, and only has about 55k miles on it. So on average it's driven about 2000 miles a year. All I've really ever done on that car is an annual oil change, spark plug change at some point and the battery died a few years ago and took out the alternator at the same time. That's until recently when I realized that I never had the timing belt service done after 22 years, so that was a big service recently. Engine runs like new now. New water pump, new belts. The C300 I believe has a timing chain, so this is no longer something modern cars need, but for older cars the timing belt service is a big item that's supposed to be done every 10 years at least. Testament for the quality of the belts that they hadn't snapped in all those years.