Problems owners report
Complaints filed with NHTSA about the 2009 Mercedes-Benz SLK, by the system named in each complaint. One complaint can name several.
- Steering1
- Tires1
- Electronic stability control (esc)1
- Service brakes1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
Engines
The most common engines in 2009 Mercedes-Benz SLK cars on Dutch roads are the 1.8 petrol (135 kW, 181 hp) and 3.0 petrol (170 kW, 228 hp).
| Engine | Power | Cars |
|---|---|---|
| 1.8 petrol | 135 kW 181 hp | 149 |
| 3.0 petrol | 170 kW 228 hp | 41 |
RDW Open Data (CC0): registered passenger cars and their fuel data · engine size rounded to 0.1 litre, net maximum power · versions with at least 20 cars
In the Netherlands
221 first registered in 2009 are on Dutch roads; 64% arrived later as imports. Median list price when new: €61,836.
Most common APK defects
- Bandenspanning niet op juiste waarde106
- Band(en) aanwezig met een profieldiepte van 1,6 t/m 2,5 mm51
- Band onvoldoende profiel41
- Richtingaanwijzers kleur wijkt af/niet toegestaan39
- Dimlicht onjuist afgesteld33
- Fusee(kogel) te veel speling26
- Waarschuwingsinrichting airbag- / gordelsysteem geeft defect24
- Veer gebroken of gescheurd23
Colours
RDW Open Data: registered vehicles and APK defects (CC0) · defect descriptions in the RDW's Dutch wording
In the United Kingdom
2,177 cars built in 2009 were licensed for the road at the end of 2025, and 327 more were declared off the road (SORN).
Department for Transport and DVLA, vehicle licensing statistics (table VEH0124, year of manufacture) · Open Government Licence v3.0
MOT test results in Great Britain
In 2023, 2,516 of these cars first registered in 2009 took their annual MOT test. 68% passed first time; among all cars first registered in 2009 the figure was 59%.
| Failed on | These cars | All cars from 2009 |
|---|---|---|
| Suspension | 15.1% | 16.4% |
| Brakes | 7.8% | 10.1% |
| Lamps, reflectors and electrical equipment | 7.6% | 18.7% |
| Tyres | 6.9% | 7.5% |
| Visibility | 4.0% | 6.5% |
| Noise, emissions and leaks | 2.1% | 5.4% |
DVSA anonymised MOT tests and results, 2023 (Department for Transport) · Open Government Licence v3.0 · first tests only; a fix made at the test station within the hour still counts as a fail
In Finland
22 of these cars first registered in 2009 were in use in Finland on 30 Jun 2026, with an average of 130,000 km on the odometer at their last inspection.
Traficom (Finnish Transport and Communications Agency), open data on vehicles in use · CC BY 4.0
In New Zealand
38 2009 cars are on the New Zealand register; 68% arrived as used imports, 26% were sold new in New Zealand.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0
Fuel consumption
Official Canadian test results for 3 variants: combined 11.0–13.9 L/100 km (about 17–21 mpg US), CO₂ 253–320 g/km.
| Variant | City | Highway | Combined |
|---|---|---|---|
| SLK 300 · Two-seater · Premium gasoline | 12.7 | 9.0 | 11.0 |
| SLK 300 · Two-seater · Premium gasoline | 13.4 | 9.1 | 11.5 |
| SLK 55 AMG · Two-seater · Premium gasoline | 16.5 | 10.6 | 13.9 |
Litres per 100 km. Natural Resources Canada, Fuel consumption ratings (open.canada.ca) · Open Government Licence – Canada
Recalls
MERCEDES-BENZ IS RECALLING MY 2006-2008 M-CLASS, R-CLASS, MY 2005-2009 SLK-CLASS, MY 2005-2008 C-CLASS, MY 2003-2004 AND 2006-2008 CLK-CLASS, MY 2003-2008 E-CLASS, MY 2004 AND 2008 CL-CLASS, MY 2008 CLS-CLASS, MY 2004 AND 2007-2008 S-CLASS, MY 2003 G-CLASS, AND MY 2003-2004, 2006 AND 2009 SL-CLASS VEHICLES. A SOFTWARE CALIBRATION NUMBER (SCN) CODING RECEIVED ON THE AFFECTED VEHICLES DURING A RECENT WORKSHOP VISIT WAS INCORRECT. DEPENDING ON THE MODEL YEAR AND MODEL AFFECTED, THE RESULTS OF AN INCORRECT SCN CODING CAN AFFECT A NUMBER OF VEHICLE SAFETY AND EMISSION FUNCTIONS INCLUDING THE FOLLOWING TYPES OF FUNCTIONS: (1) THE FUEL GAUGE READINGS MAY BE INCORRECT; (2) A STUCK FUEL-LEVEL SENSOR MAY NOT BE DISPLAYED IN THE INSTRUMENT CLUSTER; (3) THE OBD SYSTEM MAY CAUSE THE CHECK ENGINE LIGHT TO ILLUMINATE INCORRECTLY; AND, (4) THE SPEEDOMETER MAY BE OUT OF TOLERANCE.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mercedes-Benz told its dealers about the 2009 Mercedes-Benz SLK: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 10039256 | MERCEDES-BENZ: THE MALFUNCTION LIGHT IS ON WITH MULTIPLE POSSIBLE TROUBLE CODES STORED. THERE COULD BE A PROBLEM WITH THE CAMSHAFT AND/OR SCORING OF A PISTON. *RM |
| 10038977 | MERCEDES-BENZ: THE AUTO-TRANSMISSION SWITCHES TO LIMP HOME MODE OR HAS NO POWER. THERE ARE MULTIPLE POSSIBLE FAULT CODES. A PISTON MAY BE DAMAGED. *RM |
| 10037408 | MERCEDES-BENZ: SHOCK ABSORBER PROCEDURE. *RM |
| 10034566 | MERCEDES BENZ: REPROGRAM MBRACE (N123/4) DIALED NUMBERS TO HUGHES. THIS ACTION APPLIES TO NEW VEHICLE INVENTORY ONLY. *PE |
| 10034504 | MERCEDES (XENTRY): ENGINE DIAGNOSIS WARNING LAMP ACTIVATED. MAGNETIC SHORT BETWEEN ARMATURE AND POLE CORE DUE TO CALIBRATION ERROR AT VALVE AND TOLERANCE DEVIATION BY SUPPLYING MANUFACTURER. THIS CAUSES THE PURGE VALVE TO JAM IN THE OPEN STATE. *PE |
| 10030929 | MERCEDES: CORROSION PROTECTION COATINGS FOR BRAKE COMPONENTS AND HARDWARE MAY BE DAMAGED AND OR STRIPPED AWAY IF HIGHLY CONCENTRATED ACID BASED CLEANERS ARE USED. ONCE THE CORROSION PROTECTION IS DAMAGED OR REMOVED THE BRAKE COMPONENTS AND OR HARDWARE CAN BEGIN TO CORRODE. INCLUDE ALL MODELS AND MODEL YEARS. *PE |
| 10027829 | MERCEDES BENZ: REPLACE REAR AXLE DIFFERENTIAL IN MODELS 219 AND 230; MODEL YEARS 2009. THE REAR DIFFERENTIAL MAY HAVE BEEN FILLED WITH THE INCORRECT GEAR OIL. *PE |
NHTSA manufacturer communications (public domain)