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Mercedes Benz Cls Service Costs & Schedule

What a Mercedes Benz Cls actually costs to service, what needs doing at each interval, and where you can save. If you're buying one, we also cover how to check whether the previous owner actually kept up with the schedule.

C219 (2003–2010)3.0 CDI, 3.5, 3.5 CDI, 5.0, 5.4
C218 (2011–2018)2.1 CDI, 3.0 CDI, 3.5, 5.5 AMG
C257 (2018–2024)2.0 CDI, 2.9 CDI, 3.0

Mercedes Benz Cls service: key facts

Routine service items

These are the items covered in a standard service. Most garages include oil, oil filter and a basic inspection. The rest are typically checked or replaced on a schedule.

Service itemIntervalTypical cost
Engine oil and filter
Mercedes-Benz ASSYST service indicator system calculates intervals based on driving conditions, typically 12,500 miles or 12 months.
C219, C218, C257
 12,500 miles or 1 year
£120–£180
Dealer: £250–£400
Air filter
Replace every 3 services or 37,500 miles.
C219, C218, C257
 37,500 miles or 4 years
£40–£80
Dealer: £80–£150
Cabin pollen filter
Annual replacement recommended.
C219, C218, C257
 12,500 miles or 1 year
£30–£60
Dealer: £60–£120
Fuel filter
Diesel variants only - replace every 37,500 miles.
C219, C218, C257
 37,500 miles or 4 years
£150–£250
Dealer: £250–£450

Has this Mercedes Benz Cls been serviced on schedule?

Check the dealer service records to see if the work above was actually done.

★GB

£6.99 · Full refund if no records found

Periodic maintenance

Items that don't need doing at every service but should be on your radar at the right mileage or age.

Service itemIntervalTypical cost
Brake fluid
Replace every 2 years regardless of mileage.
C219, C218, C257
 2 years
£80–£120
Dealer: £150–£250
Spark plugs
Replace every 37,500 miles or 4 years for petrol engines.
C219, C218, C257
 37,500 miles or 4 years
£120–£200
Dealer: £200–£400
Coolant flush
Mercedes-Benz recommends 10-year or 75,000-mile intervals using MB 325.0 specification coolant.
C219, C218, C257
 75,000 miles or 10 years
£150–£250
Dealer: £300–£500

Known issues to watch for

The most common problems reported on the Mercedes Benz Cls, ranked by severity.

dangerous
Brake pipe corrosion and failure
CLS models show significantly elevated brake pipe corrosion rates, with MOT data showing failure rates up to 8.1x the fleet average.
major
Wheel bearing excessive play and failure
CLS models experience wheel bearing failure at 20.1x the fleet average rate, affecting all engine variants across the model range.
major
Suspension component wear
The CLS features a complex multi-link rear suspension with numerous bushes and joints that wear at 16x the fleet average rate.
major
Electronic parking brake failure (C218)
Second-generation CLS models with electronic parking brake systems show failure rates 14.4x higher than the fleet average.

1 more known issues tracked. Check a specific Mercedes Benz Cls's service records — a missed service on one of these issues could mean an expensive surprise.

Buying a used Mercedes Benz Cls? Check its service history first.

A Cls with a patchy service history can cost you thousands in missed timing belts, skipped oil changes, and hidden neglect. We pull the franchised dealer records — every visit, every stamp, every mileage reading — so you can see exactly what's been done and what's been skipped.

£6.99 · No records found = full refund, zero risk

Related

Mercedes Benz Cls service FAQs

How often does a Mercedes Benz Cls need servicing?

A Mercedes Benz Cls needs servicing every 12,500 miles or 1 year, whichever comes first. Mercedes-Benz ASSYST service indicator system calculates intervals based on driving conditions, typically 12,500 miles or 12 months.

What does a Mercedes Benz Cls service cost?

A basic service at an independent garage costs £120–£180. Main dealer servicing runs £250–£400. Major items like timing belts or gearbox services cost significantly more. Independent garages are typically 30 to 50% cheaper for the same work.

Is a Mercedes Benz Cls expensive to maintain?

Routine servicing starts from £120 at an independent garage, which is above average for this class of car. The bigger costs come from periodic items like timing belts, brake fluid changes, and transmission servicing. Keeping on top of the schedule avoids expensive failures.

How do I check a Mercedes Benz Cls's service history?

You can check any Mercedes Benz Cls's official dealer service records online using just the registration number. The check retrieves every logged dealer visit, including dates, mileage, and work done, so you can see whether the schedule has been followed or if there are gaps. It costs £6.99 and you get a full refund if no records are found.