Mercedes E280 / E350 W211/S211 Filters & Spark Plugs Guide

For the covered petrol E280 and E350 W211/S211, MANN lists C 3698/3-2 engine air filtration and HU 718/5 x oil filters. NGK UK lists six PLKR7A spark plugs, stock 4288, for E280 M272.943 and E350 M272.964. For a right-hand-drive car, MANN lists FP 3172/1 as its FreciousPlus cabin-filter option.

Coverage: conventional petrol E280 W211 saloon / S211 estate with M272.943 3.0-litre V6 (170 kW / 231 hp), and E350 with M272.964 3.5-litre V6 (200 kW / 272 hp). CGI, 4MATIC and diesel versions are outside this guide’s combined application.

Parts references at a glance

Fitment and replacement timing are separate decisions. Check the service information and previous replacement record before buying every item in a bundle.

Air filters: retain C 3698/3-2 in full

MANN names E280 M272.943 and the E350 M272 application in its W/S211 rows for C 3698/3-2. Compare the complete reference and the seller’s statement of supplied contents. Do not infer a pack quantity solely from the suffix or a product photograph.

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Check that the selected search result is the named item rather than another filter or a wider service bundle. An E-Class badge on a listing does not settle the engine application.

Oil filter: HU 718/5 x

The manufacturer catalogue lists HU 718/5 x for the covered E280 and E350 petrol applications. Check the complete number and the seals included. The E280 / E350 oil guide explains the separate 8.0-litre change reference and approved oil option.

Browse oil filters on eBay, select your vehicle and compare the full HU 718/5 x reference and listing compatibility:

The graphic opens a category for browsing. Confirm the chosen item’s application before ordering.

UK cabin filter: FP 3172/1

MANN’s current FP 3172/1 product page lists both covered petrol applications with a right-hand-drive qualifier. Its full catalogue also lists CU 3172/1 as a right-hand-drive particulate-filter entry.

Compare the named FreciousPlus option:

Keep the /1 suffix. The catalogue separately lists left-hand-drive FP 3172 and CU 3172; a recommendation written for an imported left-hand-drive car should not be copied straight into a UK parts order.

The cabin filter treats ventilation air for the occupants. It is separate from engine air filtration, so clarify which job an invoice describes when it says only “air filter”.

Spark plugs: six PLKR7A / 4288

NGK’s UK catalogue lists PLKR7A, stock 4288, quantity six for E280 M272.943 and E350 M272.964. Check whether an advertised price is for one plug or a complete set.

The older M112 E320 is listed with twelve plugs and a different application. A generic “Mercedes petrol V6” description is therefore insufficient when comparing a plug quotation or kit.

CGI is outside the selected application, and the NGK evidence used here names M272.964 rather than every E350 engine code. Confirm the engine before ordering, use the correct fitting procedure and retain a dated replacement record.

Before ordering a service kit

1. Identify E280 M272.943 or conventional E350 M272.964 and the correct generation.
2. Check the complete air- and oil-filter references and supplied contents.
3. Match the cabin filter to right- or left-hand drive.
4. Check the six-plug quantity and full NGK reference.
5. If oil is included, check its approval and enough oil for the documented change.
6. Agree owner-supplied parts with the garage beforehand.

The E280 / E350 servicing guide helps compare the parts due with the workshop’s advertised package and UK prices.

Browse the Mercedes maintenance hub and our Mercedes diagnostic scanner guides for other models and separate fault-investigation questions.

Manufacturer sources

• MANN C 3698/3-2: named petrol applications
• MANN HU 718/5 x: oil-filter applications
• MANN FP 3172/1: right-hand-drive cabin applications
• MANN 2024–26 catalogue, printed pages 215–216 / PDF 271–272 — engine rows and shared cabin-filter header.
• NGK UK catalogue, printed page 47 / PDF 49 — exact engines, PLKR7A / 4288 and six plugs.

Checked 24 October 2026. Catalogue dates are application ranges, not UK registration cut-offs. Contact Unusual Cars with corrections.

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