M273 vs OM648

Side-by-side reliability comparison

Higher reliability score
OM648 BEST 90/100
+45 points over M273
0 / 100
AVOID M273 Mercedes-Benz
0 / 100
BEST OM648 Mercedes-Benz

Specifications

M273
OM648
Brand
Mercedes-Benz
Mercedes-Benz
Verdict
AVOID
BEST
Reliability
45
90
Years
2005--2012
2002--2006
Displacement
5461 cc
3222 cc
Layout
V8
I6
Type
Petrol Na
Diesel
Power
340--388 hp
204 hp
Known Issues
2
2
Total Risk Cost
€2,200--€5,400
€450--€1,100

Character

M273

"Same sprocket problem as M272. Powerful but risky early models."

OM648

"Modern OM606 successor. Excellent highway cruiser. Strong torque."

Issues Comparison

M273 2

◆ CRITICAL
Idler gear sprocket wear — same class-action as M272 €1,800--€4,500 60,000 km--150,000 km
○ MINOR
Spark plugs + ignition coils (8 of each) €400--€900 80,000 km--150,000 km

OM648 2

● MODERATE
EGR valve fouling (city use) €300--€700 80,000 km--160,000 km
○ MINOR
Glow plugs + injector seals €150--€400 80,000 km--160,000 km

Models

M273 1

S-Class W221 2006--2011

OM648 6

E-Class W210 1999--2002 C-Class W203 2001--2005 E-Class W210 1999--2002 S-Class W220 1999--2002 S-Class W220 2002--2005 E 320 CDI W211 2002--2009 Sedan
Full M273 Report Full OM648 Report