MANN lists C 14 114 engine air filters and HU 514 x oil filters for the covered C209/A209 CLK200 Kompressor engines. Cabin filters need another check: steering side and THERMATIC or THERMOTRONIC equipment matter. NGK’s UK spark-plug catalogue separates applications by engine number.
Covered cars: CLK200 Kompressor C209 coupé and A209 cabriolet with the 1,796 cc petrol M271.940 or M271.955 engine. The older C208/A208, CLK200 CGI, V6, diesel and AMG versions need their own specifications. Registration year alone is not a reliable parts check.
Match the engine before choosing a service kit
| MANN application | Engine and output | Catalogue dates |
|---|---|---|
| 209.342 / 209.442 | M271.940; 120 kW / 163 hp | September 2002–June 2006 |
| 209.341 / 209.441 | M271.955; 135 kW / 184 hp | July 2006–October 2009 |
The dates above are MANN application ranges. Check the actual engine and model details if the car sits near the changeover or has had an engine replacement. The CLK200 CGI is listed separately even where a filter reference is shared.
Engine air filter: MANN C 14 114
MANN’s current catalogue names C 14 114 against both M271.940 and M271.955 CLK200 Kompressor applications. This filters the air entering the engine; it is separate from the cabin’s ventilation filters.
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Search Amazon for MANN C 14 114 air filtersMatch the complete part number on the actual listing and check the application with the supplier. Search results may include alternatives and similar references; their presence in a search does not make them interchangeable.
Oil filter: MANN HU 514 x
The manufacturer lists HU 514 x for the same two engine applications. Keep the x suffix when comparing a kit or invoice. An engine-oil approval or a “fits Mercedes 1.8” description does not confirm the filter.
You can browse the eBay oil-filter category below. Add or select the exact car, then confirm the listing’s complete part reference and compatibility details. Resolve any disagreement with the seller before ordering.
This graphic is an affiliate category link, rather than a guarantee that every result fits. Our CLK200 Kompressor oil guide covers the separate oil quantity and approval checks.
Cabin filters: UK steering side and climate system matter
A UK right-hand-drive CLK should not automatically receive a cabin filter copied from a left-hand-drive video or catalogue row. MANN distinguishes the following applications in its A/C209 table:
| Equipment / position in catalogue | Manufacturer reference | Application distinction |
|---|---|---|
| THERMATIC; right-hand drive | CUK 3461/1 | Activated-carbon cabin filter |
| THERMATIC; left-hand drive | CUK 3461 | Different reference from the RHD /1 version |
| THERMOTRONIC; right-hand drive | CU 3461/1 | Particulate cabin filter |
| THERMOTRONIC; left-hand drive | CU 3461 | Particulate cabin filter |
| THERMOTRONIC activated-carbon filtration | CUK 20 000-2 | Listed separately from the particulate filter |
Identify the installed climate-control system in the car’s equipment information and manual before ordering. The THERMOTRONIC entries should not be read as a choice of any one filter to replace every element in that system.
For a confirmed RHD THERMATIC application
MANN’s current CUK 3461/1 page explicitly lists the two covered Kompressor variants with right-hand drive, THERMATIC and automatic climate control. Once those conditions match your car, use the specific search below.
Search Amazon for MANN CUK 3461/1 cabin filtersCheck the /1 suffix and supplier application. If your car has THERMOTRONIC, use the appropriate system entries above rather than buying this filter solely from the CLK badge. Ask a workshop to name the exact cabin filter or filters renewed on the invoice.
Spark plugs: use the engine-number split
NGK’s UK 2024 catalogue groups M271.940, M271.942 and M271.955 in its 209-series CLK200K rows, then distinguishes these engine-number applications:
| NGK UK engine-number condition | Plug reference | NGK stock number | Quantity listed |
|---|---|---|---|
| Up to 30 853 899 | ILFR6A | 3588 | 4 |
| 30 853 900 onwards | PLKR7B8E | 94716 | 4 |
The UK table also gives date ranges, but do not substitute a registration year for its engine-number condition. Confirm the engine number and reference with the supplier, particularly around the changeover or where an engine has been replaced.
Compare the price for four plugs: a product photograph showing several does not establish the quantity supplied. No universal CLK200 plug, fitting torque or gap-adjustment instruction is implied here. Use the correct engine and plug installation guidance.
If plugs are being proposed to cure a running fault, distinguish diagnosis from routine replacement. A reminder alone does not identify a failed plug, coil or another cause.
Does a matching filter mean it is due now?
No. Catalogue references identify applications; renewal intervals come from the applicable service documentation and the previous renewal record. Keep air filter, cabin filter and plugs as separate dated entries instead of relying on the heading “full service”.
The CLK200 Kompressor maintenance guide explains the A/B reminder and provides a garage-quotation checklist. That makes it easier to buy parts for identified work rather than choosing a kit first and assuming its contents define the service.
Find more guides in the Mercedes maintenance hub. For warning lamps, gearbox or cabriolet roof faults, see our CLK W209 diagnostic scanner guide.
Sources and application limits
- MANN C 14 114, MANN HU 514 x and MANN CUK 3461/1: current manufacturer application pages.
- MANN 2024–26 catalogue, printed page 212 / PDF page 268: model, steering-side and climate-system rows, visually checked.
- NGK UK 2024 catalogue, printed page 46 / PDF page 48: engine-number split, references and quantities, visually checked.
Checked 20 October 2026. Match the full manufacturer application and current supplier information. Catalogue dates are retained as catalogue dates, rather than UK registration boundaries.
