Mercedes-Benz M273 Engine
Used & Reconditioned for Sale
5.5 V8, 4.7 V8, M273.961, M273.963, M273.923, Mercedes 500 engine
Displacement
Fuel
Production
SUB — 90–150 chars: Fits S-Class, CL, E-Class and more — verified fitment by registration, fixed prices, UK delivery.
Displacement
Fuel
Production
Configuration
Applications
Verified Fitment
Checked by registration
12-Month Warranty
On reconditioned units
UK Nationwide Delivery
2-4 working days
14-Day Returns
Uninstalled, full refund
Buy a M273 Engine for Your Vehicle
INTRO: 130–200 chars. The Mercedes-Benz M273 5.5-litre V8 was the flagship naturally-aspirated petrol engine from 2005 to 2013, powering the S-Class, CL, E-Class, ML, GL, G-Class, and R-Class. We offer 5 distinct application groups, each configured and priced for its specific vehicle.
M273 – S-Class / CL W221 / W216
S-Class W221 S500, CL W216 CL500 (2005–2013)
£1,895
Coming soonM273 – E-Class W212
E-Class W212/S212 E500 (2009–2011)
£2,095
Coming soonM273 – ML / GL W164 / X164
ML W164 ML500, GL X164 GL500 (2007–2012)
£1,995
Coming soonM273 – G-Class W463
G-Class W463 G500 (2007–2012)
£2,795
Coming soonM273 – R-Class W251
R-Class W251 R500 (2007–2011)
£1,595
Coming soonFull M273 Compatibility
INTRO: 120–200 chars; every row links to its unit page + reg-checker confirmation. The M273 V8 was fitted across Mercedes-Benz's flagship saloon, coupé, SUV, and MPV ranges from 2005 to 2013. Use the table below to find your exact chassis and variant, then click through to the correct application group for your vehicle.
| Model | Chassis | Variants | Years | Config. | Unit page |
|---|---|---|---|---|---|
| S-Class | W221 | S500 | 2005–2013 | Longitudinal | Coming soon |
| CL | W216 | CL500 | 2006–2013 | Longitudinal | Coming soon |
| E-Class | W212/S212 | E500 | 2009–2011 | Longitudinal | Coming soon |
| ML (GLE) | W164 | ML500 | 2007–2011 | Longitudinal | Coming soon |
| GL (GLS) | X164 | GL500 | 2007–2012 | Longitudinal | Coming soon |
| G-Class | W463 | G500 | 2007–2012 | Longitudinal | Coming soon |
| R-Class | W251 | R500 | 2007–2011 | Longitudinal | Coming soon |
Confirm your exact specification with the registration checker above.
M273 Engine Prices
INTRO: 120–200 chars. We offer the M273 5.5 V8 in used and reconditioned condition across five application groups. Used units are available for the S-Class, CL, E-Class, ML, GL, and R-Class applications, while reconditioned units are recommended for the G-Class where vehicle value justifies the investment.
| Application | Used from | Reconditioned from |
|---|---|---|
| S-Class / CL W221 / W216 (S500 / CL500) | £1,895 | £3,200 |
| E-Class W212 (E500) | £2,095 | £3,500 |
| ML / GL W164 / X164 (ML500 / GL500) | £1,995 | £3,400 |
| G-Class W463 (G500) | £2,795 | £4,200 |
| R-Class W251 (R500) | £1,595 | £2,900 |
DISCLAIMER (verbatim): "Prices shown are current lowest listed prices and update as stock changes. The price on each listing is the price you pay — no hidden fees at checkout.
What You Get with a M273 Engine
What You Get with a M273 Engine
What's included
Not included
Used or reconditioned?
For the S-Class, CL, and E-Class applications (Groups 1 and 2), used units are available from a reasonable donor parc given the volume of W221 and W212 vehicles now reaching end-of-life, offering good value. For the G-Class (Group 4), reconditioned units are more commonly selected given the vehicle's high residual value and owner expectation of long-term reliability. The M273 5.5-litre V8 was Mercedes' flagship naturally-aspirated petrol eight from 2005 to 2013, fitted across the S-Class, CL, E-Class, ML, GL, G-Class, and R-Class. Replacement demand is driven by mileage-related wear to timing chain components, intake manifold runner actuators, and general oil consumption on higher-mileage units — failure modes where complete engine replacement is more cost-effective than in-vehicle repair at specialist labour rates. Every prepared M273 unit addresses these wear points as standard before dispatch.
M273 Engine Buying FAQs
Answers to common fitment, condition, warranty and delivery questions.
A:Mercedes-Benz S-Class W221 (S500), CL W216 (CL500), E-Class W212 (E500), ML W164 (ML500), GL X164 (GL500), G-Class W463 (G500), R-Class W251 (R500). All are 5.5-litre V8 "500"-badged applications from 2005–2013.
A:M273.923 (4.7L, very rare in UK), M273.961 (5.5L, saloon/coupé applications), M273.963 (5.5L, SUV applications). All share the same base architecture; external dress (sump, brackets, harness) varies by application.
A:For the S-Class, CL, and E-Class applications (Groups 1 and 2), used units are available from a reasonable donor parc given the volume of W221 and W212 vehicles now reaching end-of-life, offering good value. For the G-Class (Group 4), reconditioned units are more commonly selected given the vehicle's high residual value and owner expectation of long-term reliability.
A:Use the registration checker to confirm chassis code, then cross-reference the engine code stamp on the block (M273.96x). Match against the listing's stated application group. Do not assume interchangeability between saloon and SUV applications without verifying sump and bracket compatibility.
A:6–12 month warranty depending on condition purchased. UK nationwide palletised delivery. Free compatibility check before dispatch.
Check M273 Fitment for Your Vehicle
CTA_H2: Check M273 Fitment for Your Mercedes