Mercedes Servicing & Maintenance

Servicing & Maintenance Guides / Mercedes

Mercedes servicing and maintenance guides for UK owners: find vehicle-specific oil and filter information, compare service costs and understand ASSYST / ASSYST PLUS reminders. Start with your model, or choose the message shown on your dashboard.

Choose your Mercedes

Choose the model and generation that matches your car. A similar badge or service message does not establish the same maintenance requirements.

CLA220d C117: start here

Start with the CLA220d C117 maintenance overview, then choose a guide to oil, filters, service costs or dashboard reminders.

Open the CLA220d service and maintenance guide →

C220 CDI W204: OM651 servicing

Plan the service, check engine-oil approval and capacity, and choose filters for the covered OM651 application.

For dashboard reminders, see the W204 ASSYST PLUS service-message guide.

E220 CDI W212: OM651 servicing

Plan the service, check the documented oil approval and capacity, and compare the Euro 5/Euro 6 engine-filter branches and right-hand-drive cabin filters.

For dashboard reminders, see the W212 ASSYST PLUS service-message guide.

C220 d W205: OM651 servicing

Identify the earlier OM651 application, check its oil reference, compare engine filters and distinguish the ventilation prefilter from the main cabin-filter choices.

For dashboard reminders, see the W205 ASSYST PLUS service-message guide.

E220 d W213: OM654 servicing

Explore maintenance planning, documented oil approvals and capacity, and filter references for the selected E220 d OM654.920 application.

A220 CDI and A220 d W176: diesel servicing

Plan maintenance for the selected OM651.930 applications, compare the documented oil-capacity references, and check oil, air, fuel and cabin filters including steering-side differences.

GLA220 CDI and GLA220d X156: diesel servicing

Plan maintenance for the selected OM651.930 applications, check the documented engine-oil reference, and compare oil, air, fuel and cabin filters including steering-side differences.

SLK250 CDI / SLK250 d R172: OM651 diesel

Plan diesel servicing and compare UK costs, check the 6.5-litre oil reference and approvals, and choose oil, air, cabin and fuel filters including the heating configuration.

SLK200 and SLK250 R172: early petrol servicing

Plan maintenance for the early 1.8-litre M271 petrol models, check engine-oil approval and capacity, and match manufacturer references for filters and spark plugs.

GLC220d X253: earlier OM651 diesel servicing

Plan maintenance for the earlier OM651 applications, check the named GLC220d 4MATIC oil-capacity reference, and compare engine filters, ventilation prefilters and cabin-filter choices.

SLK200 Kompressor R171: later petrol models

Plan maintenance for the later M271.954 Kompressor, understand the R171 service-display wording, check oil approval and capacity, and match filters and spark plugs.

CLK200 Kompressor C209 coupé and A209 cabriolet

Plan servicing for the early and later 1.8-litre Kompressor engines, check oil capacity and approvals, and match filters and spark plugs including UK cabin-filter differences.

E200/E250 CGI C207 coupé and A207 cabriolet: early petrol

Plan servicing for the early 1.8-litre M271 CGI engines, check engine-oil capacity and approvals, and match engine filters, right-hand-drive cabin filters and spark plugs.

C180/C200 Kompressor 203-series: 1.8-litre petrol

Plan servicing and check oil information for the covered W203 saloon and S203 estate, then compare manufacturer filter and spark-plug references including supported Sport Coupé applications.

SLK230 Kompressor R170

SLK320 R170: M112 V6

E220 CDI W211/S211: OM646 diesel

C180/C200 Kompressor W204/S204: M271 petrol

CLK320 C209 coupé and A209 cabriolet: M112 V6

SL350 R230: M112 and M272 V6

E200/E250 CGI W212 saloon and S212 estate: early petrol

C180/C200/C250 CGI W204 saloon and S204 estate: early petrol

SLK280 / SLK300 R171: 3.0-litre V6

Plan servicing for the M272.942 V6, compare UK service costs, check the 8.0-litre oil reference and approvals, and choose filters and six spark plugs.

SLK350 R171: early and facelift V6

CLS320 CDI C219: OM642 diesel

E320 CDI W211/S211: OM642 V6 diesel

E320 CDI W211/S211: OM648 straight-six

CLK320 CDI C209 coupé and A209 cabriolet: OM642 diesel

Plan diesel CLK servicing, compare UK package-price examples, check oil capacity and approvals, and choose air, oil, cabin and fuel filters for the covered application.

CLK280 / CLK350 C209 coupé and A209 cabriolet: M272 V6

Plan servicing, compare UK costs, check oil capacity and approvals, and choose filters and six spark plugs with climate-equipment checks.

E350 CDI W212 saloon / S212 estate: OM642 V6 diesel

Plan servicing and compare UK costs, check the 8.0-litre oil reference and approvals, and identify the two-piece air-filter pack and fuel-filter branches.

CLS350 CDI C218 coupé / X218 Shooting Brake: earlier 265 hp V6

Plan servicing and compare UK costs, check the 8.0-litre oil reference and approvals, and choose engine and cabin filters for the covered early CDI application.

E280 / E350 petrol W211 saloon / S211 estate

Servicing costs, the 8.0-litre oil reference, and filters and six spark plugs for the covered conventional M272 engines.

Mercedes service-message guides by generation

These guides explain ASSYST in each generation. Use the applicable vehicle documents and service information to establish the actual work due.

Oil and service costs

For a CLA220d C117, use the engine-oil guide to distinguish Mercedes approval from viscosity and oil-change capacity from topping up. Use the service-cost guide to compare VAT, included operations and additional work.

Specifications, parts fitment and replacement timing are separate checks. Each article states its covered vehicle and the limits of the evidence.

Mercedes service messages explained

Choose the wording shown on the dashboard, or start with the system overview.

ASSYST / ASSYST PLUS explained — how the reminder system fits into servicing.
Service A and Service B — understand the service labels.
Service codes, letters and numbers — identify which code system you are looking at.
B5 service explained — why the visible suffix is not a universal parts list.
What is an ASSYST PLUS workshop code? and how to find the appropriate workshop-code information.
Service overdue / exceeded — understand the reminder and booking questions.
ASSYST PLUS stuck at 365 days — what to check before assuming a fault.

Tools and diagnostics

Explore our Mercedes OBD2 and diagnostic scanner guides when you need to investigate a separate warning or choose a tool. Fault-code reading, maintenance-data access and service confirmation are different functions: check the exact vehicle and function before buying.

For the cars themselves, browse Mercedes models, history and buying guides.

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