| Type | 2-door, 2-passenger midsize convertible |
| Layout | Front engine/rear-wheel drive |
| Engine | 3.0-litre V6, DOHC, 24 valves |
| 3.5-litre V6, DOHC, 24 valves | |
| 5.5-litre V8, SOHC, 24 valves | |
| Horsepower | 228 @ 6100 rpm |
| 300 @ 6500 rpm | |
| 355 @ 5750 rpm | |
| Torque | 221 @ 2500 rpm |
| 266 @ 4900 rpm | |
| 376 @ 4000 rpm | |
| Transmission | 6-speed manual/7-speed automatic |
| Tires SLK300 | P205/55R16 performance (front) |
| P225/50R16 performance (rear) | |
| Tires SLK350 | P225/40R18 performance (front) |
| P245/35R18 performance (rear) | |
| Tires SLK55 | P225/40R18 performance (front) |
| P245/35R18 performance (rear) | |
| Curb weight SLK300 | 1470 kg (3240 lbs)(M/T) |
| 1490 kg (3284 lbs)(A/T) | |
| Curb weight SLK350 | 1490 kg (3284 lbs)(M/T) |
| 1510 kg (3328 lbs)(A/T) | |
| Curb weight SLK55 | 1570 kg (3461 lbs) |
| Wheelbase | 2430 mm (94.8 in.) |
| Length | 4103 mm (161.5 in.) |
| Length SLK55 AMG | 4099 mm (161.3 in.) |
| Width | 2012 mm (79.2 in.)(w/mirrors) |
| Height SLK300 | 1296 mm (50.5 in.)(top up) |
| Height SLK350 | 1298 mm (51.1 in.)(top up) |
| Height SLK55 AMG | 1287 mm (50.6 in.) |
| Cargo capacity | 300 litres (10.5 cu. ft.) |
| Fuel consumption 3.0 M/T | City: 11.5 L/100 km (25 mpg Imp) |
| Hwy: 7.7 L/100 km (37 mpg Imp) | |
| Fuel consumption 3.0 A/T | City: 11.0 L/100 km (26 mpg Imp) |
| Hwy: 7.4 L/100 km (38 mpg Imp) | |
| Fuel consumption 3.5 M/T | City: 12.6 L/100 km (22 mpg Imp) |
| Hwy: 8.0 L/100 km (35 mpg Imp) | |
| Fuel consumption 3.5 A/T | City: 11.6 L/100 km (24 mpg Imp) |
| Hwy: 8.0 L/100 km (35 mpg Imp) | |
| Fuel consumption 5.5 | City: 14.8 L/100 km (19 mpg Imp) |
| Hwy: 9.0 L/100 km (31 mpg Imp) | |
| Fuel type | Premium |
| Warranty | 4 yrs/80,000 km |
| Powertrain warranty | 4 yrs/80,000 km |
| Side airbags | Standard |
| Curtain airbags | N/A |
| Anti-lock brakes | Standard |
| Traction control | Standard |
| Stability control | Standard |
| Assembly location | Bremen, Germany |

