How much is a 2018 Mercedes-Benz C-ClassDiesel worth in Ireland?

The median asking price for a 2018 Mercedes-Benz C-ClassDiesel on the Irish used-car market is around €24,198, based on 8 live listings tracked by Carintel.ie.

How much does a 2018 Mercedes-Benz C-Class depreciate per year?

A Mercedes-Benz C-Class loses roughly 15.4% of its value per year on the Irish used-car market based on Carintel.ie's regression across active listings.

Is it cheaper to import a 2018 Mercedes-Benz C-Class from Northern Ireland?

It depends on spec, mileage and CO2. Carintel.ie compares ROI median prices against Northern Ireland listings' landed cost, including VRT, NOx levy and registration fees, so you can see the saving at a glance on this page.

What are the running costs of a 2018 Mercedes-Benz C-ClassDiesel?

This page estimates annual running costs for a 2018 Mercedes-Benz C-ClassDiesel using WLTP consumption data, current Irish fuel and electricity prices, and Irish motor tax bands.

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Data and calculations are in active development and changing regularly. Please do not make buying decisions based solely on this site, always verify with other sources.

Analysing market data

Fetching listings · computing fair value · building charts

Engine:All engines 1.6L · 10 2.0L · 8 2.1L · 33

Filter by trim, gearbox, source1 active

Trim:All Unknown · 6

Source:ROI All NI

Market Intelligence

Mercedes-Benz C-Class2018

Diesel · 2.0L

28 days avg on market · Low data confidence

High DemandLimited Data

No ROI listings currently available

There are 8 NI listings for this model. Switch to "All" or "NI" source filter above to see pricing data.

Updated 11h ago · ROI · Low confidence

Median listing price

€24,197.5

private sale ~€21,333 Pricing assumptionsAssumptions· Good condition, full service history· No outstanding finance or damage· Based on ads seen in the past 30 days

Est. trade-in

€16,675 – €20,248

15–30% below private sale

Avg mileage

117k km

typical 117k km

Days listed

28d

avg on market · demand 90/100

AI Market Summary

Solid performer in executive segment — refined diesel engines, smooth gearbox, strong resale momentum (up 26% year-on-year in Irish market).
Pricing firm relative to competitors; median €22,698 reflects current demand. Well-maintained examples at lower end of range offer genuine value for buyers accepting diesel ownership.
DPF regeneration failures are the main risk on this generation, especially cars used for short urban trips. Budget €800–1,500 if limp mode appears; also watch for EGR carbon build-up and injector fouling causing rough starts.
Before purchase, request full service history and ask seller specifically whether DPF regeneration warning lights have occurred. A pre-buy diagnostic scan (€100–150) will flag injector or rail sensor faults early.
Median mileage 140k km is realistic for an 8-year-old Irish car; verify NCT status and check motor tax band before committing — CO2-based rates favour lower-emission diesels here.

AI-generated analysis · Carintel.ie · verify independently before purchasing

Analysis & Insights

Price Analysis Costs Import Recalls & Info

Vehicle specification

Manufacturer WLTP data

Power

134 bhp

Torque

310 Nm

229 lb·ft

0–62 mph

9.7s

135 mph top

Engine

1.6L

1600 cc

Boot space

480L

1480L folded

Seats

4 doors

Fuel economy & emissions

Combined

68.30000000000001 mpg

4.15 L/100km

Urban

56.7 mpg

Extra urban

76.55000000000001 mpg

CO₂

108 g/km

EURO 6

Fuel tank

53L

Dimensions

Length

4.69m

4686 mm

Width

1.81m

Height

1.45m

Wheelbase

2.84m

Kerb weight

1,495 kg

2,065 kg gross

Safety & ownership

Euro NCAP

★★★★★

Adult 92% · Child 84%

Insurance

Group 25E

Warranty

3 years

Reliability & Safety Recalls

Mercedes-Benz C-Class 2018

Reliability

3/5

The 2018 Mercedes-Benz C-Class diesel offers refined performance and strong build quality, but diesel engines from this era are prone to DPF and emissions system issues that can be costly to repair. Ownership experience is generally positive for well-maintained examples, though independent servicing is strongly recommended to avoid main dealer premiums. Value for money is moderate given repair risks and depreciation.

Known issues

DPF (diesel particulate filter) clogging and regeneration issues, particularly on low-mileage or short-trip driving; can result in limp mode and €800–1,500 repair costs
EGR valve carbon build-up and sticking, leading to rough idle, reduced power, and potential engine management light
Diesel injector fouling and common-rail pressure sensor faults, causing difficult cold starts and white smoke
Transmission fluid leaks from the 7-speed automatic gearbox; relatively minor but requires seal replacement
AdBlue system faults and NOx sensor degradation; reduced performance and warning lights if not addressed
Timing chain rattle on cold start (Mercedes M270/M274 petrol engines, not diesel; OM651 diesel is generally chain-driven and more reliable in this regard)

Good for

Fuel economy and range on the motorway; real-world combined economy around 45–50 mpg with careful driving
Refined NVH (noise, vibration, harshness); cabin is quiet and comfortable for long journeys
Solid build quality, interior materials, and German engineering; feels premium for the class
Strong resale value and parts availability through independent specialists and used breakers

Years to avoid: 2015, 2016, 2017

AI-generated summary · verify with DVSA & owner forums