Mercedes-Benz R-Class 2009 Owners Manual - Manual (Page 395)

Engine
393
Engine
Model R 320 BlueTEC (251.125) 20 R 350 (251.165) 20
Engine 642 272
Mode of operation Diesel 4-stroke engine 4-stroke engine, gasoline injection
No. of cylinders 6 6
Bore 3.27 in (83.00 mm) 3.66 in (92.90 mm)
Stroke 3.62 in (92.00 mm) 3.39 in (86.00 mm)
Total piston displacement 182.3 cu in (2 987 cm 3 ) 213.5 cu in (3 498 cm 3 )
Compression ratio 16.5:1 10.7:1
Output acc. to SAE J 1349 210 hp / 3 400 rpm (157 kW / 3 400 rpm) 268 hp / 6 000 rpm (200 kW / 6 000 rpm) 21
Maximum torque acc. to SAE J 1349 400 lb-ft / 1 600 rpm - 2 400 rpm
(543 Nm / 1 600 rpm - 2 400 rpm)
258 lb-ft / 2 400 rpm - 5 000 rpm
(350 Nm / 2 400 rpm - 5 000 rpm)
Maximum engine speed 4 500 rpm 6 500 rpm
Firing order 1-4-2-5-3-6 1-4-3-6-2-5
Poly-V-belt 2 035 mm 2 404 mm
20 The quoted data apply only to the standard vehicle. Contact an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.
21 Premium fuel required. Performance may vary with fuel octane rating.
Technical data
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