The generation sets a Mercedes-Benz C's price, not the badge

In brief

• Median prices by model year run from 1,290 € to 34,770 €, so within a single name the price grows more than twentyfold.
• Diesel accounts for 56.7% of sales of this model, against 31.5% across the market as a whole. The median diesel is a 2011 car with 324,300 km on the clock.
• Of cars first registered in 2012, 34.1% failed their roadworthiness inspection, while the same age group nationally stopped at 26.8%. Both had a median odometer reading of 260,000 km.
• The median car sold in Uusimaa is a 2015 model at 14,400 €; in Etelä-Pohjanmaa it is a 2009 model at 4,990 €.

The price says nothing its peers do not

The price level of a used car can usually be worked out from the make and model, and at first glance the Mercedes-Benz C obeys that rule. There were 2,001 sales of the model during the period, which is 2.0% of all 102,325 sales. The median price paid is 9,000 €, a little below the market-wide 10,400 €. The badge, in other words, does not appear to cost anything.

The peer group says the same. The Skoda Octavia, from the same body style and the same price band, changes hands at a median of 11,400 €, the E-Class at 10,990 € and the Volkswagen Passat at 7,999 €. The Audi A4 stops at 5,690 € and the Toyota Avensis at 5,890 €. The three-pointed star does not lift the car above its own size class, and that is exactly why the picture given by a single figure looks credible.

Nor is this a rare car. The peer group is made up of estates, and the C is the most traded of them: the Octavia had 1,760 sales, the Passat 1,373 and the E-Class 862. In this size class the model is the single most common name on the market, so the figures do not rest on a handful of sales.

One difference from the peers shows up straight away. The median C sold is a 2012 car, while the market median is 2014 and the Octavia's is 2016. The same money buys an older car in this model than in its peers, and that is the first hint that the median is not measuring the same thing here as elsewhere.

Every row in the chart is a median, and every one of them strips out the same thing. A median tells you where the queue bends, but not how long the queue is. Two models can share a median and have completely different price ranges.

Make and model ought, then, to tell you roughly what price is being discussed, and on the peer evidence this model sits in the middle of its own size class. The rule holds only for as long as the group is looked at as one, though. Open up the same two thousand sales and the picture becomes a different one.

Half of all sales fit inside a thirteen thousand euro band

Line the sales up by price and the middle half of the queue is not narrow. Half of all sales fall between 3,950 € and 16,990 €. That range is 144.9% of the median, so the band on its own is one and a half times as wide as the median is large. At the bottom sits a car worth little more than scrap value; at the top, one with warranty left.

The ends of the range are best read as model years. The lower bound of 3,950 € lands around the 2008 and 2009 model years, the latter of which has a median price of 5,100 €. The upper bound corresponds to the 2017 and 2018 model years, with medians of 17,400 € and 17,900 €. Half of all sales therefore fit inside roughly ten model years, and the remaining quarters spread out on either side.

What matters is what happens to that same range when the sales are narrowed to a single model year. Half of the 2015 sales fall between 10,890 € and 16,800 €, and half of the 2020 sales between 19,500 € and 24,900 €. Each band is less than half as wide as the range for the model as a whole. Within one model year, in other words, the price behaves perfectly normally.

The same holds at the youngest end. Half of the 2023 sales fall between 31,200 € and 38,790 €, so the band is wide in money but narrow relative to the price. In a nearly new car the price turns on specification, in an old one on condition, and in both cases the model year is already known before the price is looked at.

Half of the 2016 sales fall between 11,900 € and 18,990 €. Inside that band sits everything a buyer can actually negotiate over: specification, condition and mileage. The gap between model years, by contrast, is fixed by the year the car was built, and there is no negotiating with that.

The spread does not come from identical cars fetching different prices. It comes from very different cars being traded under one name. That leaves two questions: what differs between these cars, and how much does each difference explain.

Four generations share one name

The model designation has outlasted every car that has worn it. The C-Class has been built in four body generations: the W203 from 1999 to 2010, the W204 from 2006 to 2015, the W205 from 2014 to 2021 and the W206 from 2021 onwards. In the Finnish used-car market all of them are still on sale at the same time, and a buyer compares them under a single search term.

The medians by model year show what that costs. The 2001 model year has a median of 1,290 € and the 2023 model year one of 34,770 €. Everything else falls in between: the 2011 model year costs 7,400 €, the 2013 model year 8,900 € and the 2020 model year 22,800 €.

The curve does not rise evenly. From the 2012 model year to the 2013 model year the price moves from 8,500 € to 8,900 €, but by the 2015 model year it is already 13,800 €. Across two model years the price grows by more than half, even though the age gap is two years. That is precisely where the W205 entered production in 2014.

At the other end of the curve the opposite happens. The 2006 model year has a median of 2,790 €, the 2004 model year 2,000 € and the 2002 model year 1,800 €. Below three thousand euros the year of manufacture stops mattering much at all, because at that point the price is set by repair costs rather than by the age of the car. The curve is steep in the middle and flat at both ends.

Sales volumes follow the same split. The 2015 model year saw 174 sales and the 2016 model year 162, but the older 2008 model year also stays near the top with 165. The market has two clear centres of gravity: the first years of the W205 and the tail end of the W204.

A change of generation shows up in the price more sharply than any single year of age. For a buyer that means two model years apart can cost more than ten years apart within the same generation. Comparisons are therefore worth making one generation at a time rather than by the model name.

These cars are driven a long way

The second difference is in the odometer. The median Mercedes-Benz C sold has 260,000 km behind it, against 184,000 km for the market as a whole. The gap is more than seventy thousand kilometres, and it shows up directly at the bottom end of the price range.

Within the peer group, though, the C is not an outlier. The E-Class from the same maker changes hands at 302,485 km and the Audi A4 at 290,000 km, while the Skoda Octavia moves on at 204,000 km. The Volkswagen Passat sits in between at 250,000 km. This is not a quirk of one model, then, but a matter of what kind of cars are bought in this size class and what they end up doing.

Mileage tracks the model year in the same way the price does. The median 2023 car has covered 78,000 km, the median 2015 car 240,000 km and the median 2008 car 343,000 km. A three hundred thousand kilometre car and an eighty thousand kilometre car are not the same product, even though they turn up on the same results page under the same name.

At the oldest end the readings climb higher still. Cars from the 2005 model year have a median odometer reading of 386,820 km. In these cars the price no longer measures age but how much longer the body and drivetrain will keep going.

At the young end of the curve the gap is just as steep in the other direction. The median 2022 car has covered 81,000 km and the median 2020 car 122,000 km, less than half of what the median 2015 car has done. Kilometres pile up quickly in this model, but they pile up during the first ten years, after which the curve flattens.

The explanation lies in what these cars are bought for. The most traded body style is the estate, and an estate is usually bought by someone who needs space and drives a lot. Add the diesel share to that equation and the result is a car that gathers mileage faster than a smaller car at the same price. That is a pattern of use rather than a fault, but it feeds straight into the price.

The gap to the peer group is large in relative terms too. The Octavia's median reading of 204,000 km is 21.5% below the equivalent figure for the C, even though the two share a body style and a price band. Mileage splits the model into two groups as clearly as price does, and the same cars land on the same side of both splits.

One name, two separate markets

The sharpest divide is in fuel type. Diesel accounts for 56.7% of sales of the model, against 31.5% of sales across the market. Petrol stops at 29.4% and plug-in hybrids at 10.1%. The model leans on diesel to a degree the market as a whole does not approach.

The shares themselves are not the interesting part here. What is interesting is that the two largest groups are opposites on every measure. There were 1,135 diesel sales, with a median model year of 2011, 324,300 km on the clock and a median price of 7,000 €. There were 202 plug-in hybrid sales, with a median model year of 2021, 105,000 km and a median price of 23,990 €.

These are two separate markets that merely travel under one name. In one, buyers are looking at a fifteen-year-old long-distance diesel; in the other, at a five-year-old plug-in hybrid. Add them together and take the median, and the result lands at a point where neither car is on offer.

Petrol sits between the two, but closer to diesel. There were 589 petrol sales, with a median model year of 2009 and 214,000 km on the clock, and their median price of 7,990 € is close to the diesel level. Hybrids accounted for 74 sales at a median price of 22,890 € and a median reading of 129,000 km. More than four in five sales therefore involve diesel or petrol, and the median model year of each is 2011 or older.

One group is missing entirely. Fully electric C-Class cars do not appear in the sales at all, even though electric cars make up 10.3% of the market. There has been no fully electric version of the model during the years the used stock is drawn from, so the choice of fuel here is still between diesel, petrol and the plug-in hybrid.

Fuel type explains more of the spread than any other single factor, because it moves hand in hand with both age and mileage. An old car is most likely a diesel, and a young one most likely a plug-in. Choosing a fuel type in this model means choosing a decade at the same time.

Older cars fail the inspection more often than most

Age brings condition with it. According to the Finnish Transport and Communications Agency (Traficom), a passenger car must have its first roadworthiness inspection (katsastus) within four years of first registration and then every two years, and once a car is more than 10 years old it must be inspected annually. The median car in this model is a 2012, so it is already on the annual cycle.

In the Traficom inspection statistics, comparison only makes sense within the same year of first registration, because age explains failures more than the model does. Of cars first registered in 2012, 34.1% failed their inspection, while the same age group nationally stopped at 26.8%. Both have the same median odometer reading of 260,000 km, so the difference is not explained by kilometres driven.

The gap narrows as the cars get younger. For cars first registered in 2016 the failure rate is 29.1% in this model series and 17.4% nationally, but for cars first registered in 2019 the figures are 11.5% and 10.7%, which is to say the same. An old C stands apart from the national level; a young one does not.

At the oldest end the failure rate is highest. Of cars first registered in 2005, 54.4% failed their inspection, while the same age group nationally stopped at 44.3% and the median odometer reading was 307,000 km. More than half of the inspections in this age group therefore end in a failure, and the repair is a cost that does not show in the asking price.

The fault categories show where the money goes. The most common recorded category is axles, wheels and suspension, with 12,097 faults, followed by braking systems with 6,859. These are counts of faults rather than of cars, since one car can have several faults in the same category. Suspension parts are also where the weight of a heavy car and a long mileage show up first. There is a checklist in preparing for the inspection.

The third most common category is environmental faults, with 1,706 recorded. Chassis and body come to 1,212 faults and steering to 886, so the two most common categories are in a class of their own. For a buyer the order means it is worth listening to the suspension and the brakes on a test drive, because that is where failures in this model series come from.

Uusimaa trades a different car from Etelä-Pohjanmaa

There is another possible explanation for the spread, and it deserves to be taken seriously. Prices differ between regions as sharply as they do between model years. The median price is 14,400 € in Uusimaa, 6,500 € in Pohjois-Pohjanmaa and 4,990 € in Etelä-Pohjanmaa. A threefold gap between provinces could in principle mean that location rather than the car sets the price.

The same regional list, however, dismantles that explanation. The median car sold in Uusimaa is a 2015 with 210,000 km, while in Etelä-Pohjanmaa it is a 2009 with 344,200 km. In Pohjois-Pohjanmaa the figures are 2010 and 317,000 km. The price does not change with the province but with the car, and the provinces differ from one another in how old the cars circulating in them are.

Satakunta repeats the same pattern on a smaller scale. There were 62 sales there, the median model year is 2014 and the median price 10,000 €, so both age and price sit above the median for the model as a whole. Provinces line up according to the age of the stock being traded in them, not according to what people there are willing to pay for the same car.

Pirkanmaa is the single clearest piece of evidence. There were 283 sales there, or 14.1% of the model's sales, with a median model year of 2013 and 261,000 km on the clock. When age and mileage land close to the median for the whole model, so does the price: the median is 9,750 €. In Lappi, by contrast, the median model year is 2009 and the reading 330,000 km, and the price drops to 5,990 €.

Uusimaa is also the largest single market, with 519 sales, or 25.9% of the model's total. It has both the most cars and the youngest stock, and both facts turn up in the same figure. For a buyer that is useful: anyone after a newer car will find the widest choice there, and anyone after the cheapest possible car should look at provinces where the stock is older. Either way the choice is about the age of the car rather than its location.

In this model, the regional gap is another name for the age gap, not an alternative to it.

Nine thousand euros buys a fourteen-year-old car

For a buyer, the collapse of the median comes down to one concrete thing. The median price paid of 9,000 € does not buy an average C, because there is no such car. It lands between the 2012 and 2013 model years, whose medians are 8,500 € and 8,900 € and whose odometer readings run to around three hundred thousand kilometres. The same money will not reach a 2016 car, whose median is 15,900 €.

The median asking price across current listings is 11,980 €, and there are 1,306 listings. The median of the asking prices is 33.1% higher than the median of the sales. The gap says that the stock on offer leans towards the newer end more than the group of cars actually changing hands does.

A practical rule follows directly. Once a budget is fixed, it is worth working out which model year it reaches, and then comparing only listings from that model year. At nine thousand euros the comparison set is the 2012 and 2013 model years, and within them the difference comes down to condition and mileage rather than to whichever car happens to top the search results.

At the other end of the range the money buys a different car. The upper bound of 16,990 € corresponds to a 2017 car, whose median odometer reading is 160,000 km, about half that of the median car. The difference between the two cars is larger than the price gap suggests, because the more expensive end also brings a newer generation and a fresher inspection history.

The seller side differs from the market too. Dealers accounted for 58.5% of sales of the model, against 64.2% across the market as a whole. The contrast with the peer group is sharper still: dealers sold 74.0% of Octavias. Private sales are therefore more common than usual in this model, which fits a picture of an old and heavily driven stock.

For a buyer that means two things. Anyone shopping at the older end will meet private sellers more often, which leaves no dealer liability behind the sale, and the highest inspection failure rates fall at that same end. These two things land on the same cars, not on different ones.

Under one name you can buy a two thousand euro repair project or a thirty thousand euro near-new car. The median only tells you where between the two they sit.

Ask the model year before you ask the price

The Mercedes-Benz C is a good example of the point at which a model name stops being price information. The name has carried four generations and more than twenty model years, and all of them are still on sale at the same time. One figure cannot describe a group like that, and the longer a model stays in production, the less its name tells you.

In practice it is worth starting from the model year and the fuel type and looking at the price only afterwards. Within one model year the range is narrow and the prices are comparable with each other, and a difference between two listings then genuinely says something about the cars. Between model years the comparison is mostly a comparison of age, and mileage and inspection history are worth checking as well. Two C-Class cars at the same price can be different generations, different fuels and a hundred thousand kilometres apart.

Three questions are enough to start with. Which model year is this car, what is its odometer reading, and when was it last inspected. Only after those does an asking price become a figure you can compare with something. Without them the comparison is aimed at the name, and in this model the name is the part that has stayed the same while everything else changed.

The same effect shows up well beyond this model. The price of a used car follows the car rather than the name it happens to wear, and the same finding can be read from the fuel-type side in an electric car's price tells you its age.

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