M273
Mercedes-Benz · V8 NA 4.7-5.5L
2005–2012
"Same sprocket problem as M272. Powerful but risky early models."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
Idler gear sprocket wear — same class-action as M272
▸Rattling, oil pressure drop, timing events, catastrophic failure risk
Same sprocket problem as M272 but V8. Even more expensive to fix due to complexity.
Same VIN check needed. Pre-Oct 2006 V8 S-Class: budget €1,800-4,500. Very expensive engine bay on W220.
Spark plugs + ignition coils (8 of each)
▸Misfires per cylinder, rough idle, check engine light
V8 means 8 plugs and 8 coils. Replace as set. More expensive than V6 due to parts count.
Budget €400-900 full set. Greek Mercedes specialists familiar with W220/W221.
Models with M273 1
Other Mercedes-Benz Engines
Tuning Potential
N/A
Frequently Asked Questions
Is the Mercedes-Benz M273 reliable?
The Mercedes-Benz M273 scores 45/100 with a verdict of AVOID. It has 2 documented issues with total repair costs between €2,200 and €5,400.
What are the common problems with the M273?
The most common issues are:
- Idler gear sprocket wear — same class-action as M272 — critical, repair cost €1,800–€4,500, 60,000 km–150,000 km
- Spark plugs + ignition coils (8 of each) — minor, repair cost €400–€900, 80,000 km–150,000 km
What cars use the Mercedes-Benz M273?
The M273 is found in:
- S-Class (2006–2011)
How much does it cost to repair the M273?
Total potential repair costs for all 2 known issues range from €2,200 to €5,400. The most expensive issue is typically .
What years was the M273 produced?
The Mercedes-Benz M273 was produced from 2005 to 2012. It is a 5461cc V8 petrol na engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.