Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 SLK230.
The 2003 Mercedes SLK230 is a lightly documented model year in the reliability record, with just five owner complaints on file, exterior lighting standing out as the top reported concern, and zero recalls issued by Mercedes. That low-complaint, no-recall profile places the 2003 SLK230 toward the quieter end of the model’s reliability history, suggesting the captured issues are scattered rather than systemic. For researchers, this makes the 2003 model a useful baseline, where the small number of reports points to isolated owner experiences rather than a broad pattern of defects.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 48 · 690 CCA battery. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
| Engine air filter | 6040941904 |
| Battery | 0009823108 |
| Front wiper blades | 1708200845 |
| Thermostat | 015997234864 alt 1112000915 |
| Cabin air filter | 2108300818 |
Engine, drivetrain, dimensions and economy.
| Overall length | 157.9 in |
| Overall width | 67.7 in |
| Overall height | 50.4 in |
| Wheelbase | 94.5 in |
| Curb weight | 3053 lb |
| Track (front / rear) | 58.7 / 58.7 in |
| Weight distribution (front / rear) | 52/48 |
Capacities, torques and tune-up values from the factory service manual.
This engine DOT 4 brake fluid. Torque the oil drain plug to 18.0 ft-lbs. The firing order is 1-3-4-2.
| Brake Fluid | DOT 4 |
| Differential Gear Oil Capacity | 2.5 Pints |
| Intake Manifold to Engine Bolts | 15 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 25 ft-lbs |
| Engine Oil Pan Drain Plug | 18.0 ft-lbs |
| Cylinder Firing Order | 1-3-4-2 |
| Cylinder Firing Order | 1-3-4-2 |
| Spark Plug Gap | 0.031 in |
| Refrigerant | R134a |
| Refrigerant Capacity | 1.80-1.90 lbs |
| Oil Group | PAG |
| Oil Type | MB part number 0019890803 or equivalent |
| Standard BCI Group Number | 48 |
| Standard BCI Cranking Performance | 690 cca |
| Injector Primary Resistance | 14-17 ohms |
| Engine Compression | Standard: 156-213, Supercharged: 109-152 psi |
| Engine Oil Pressure | 10 psi @ 700 rpm, 43.5 @ 3000 rpm psi |
| Intake Valve Lash | Hydraulic in |
| Exhaust Valve Lash | Hydraulic in |
| Brake Application | WITH SOLID ROTOR / WITH VENTED ROTOR |
| Torque Caliper to Bracket | 41 ft-lbs / 38 ft-lbs |
| Torque to Knuckle | 81 ft-lbs / 85 ft-lbs |
| Minimum Pad Thickness | Front: 0.079; Rear: 0.079 in |
| Brake Application | WITH SOLID ROTOR / WITH VENTED ROTOR |
| Rotor Nominal Thickness From | 0.354 in / 0.866 in |
| Rotor Nominal Thickness To | 0.354 in / 0.866 in |
| Rotor Minimum Machining | 0.299 in / 0.787 in |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 2003 Mercedes SLK230 dominate in one area — the exterior lighting, 2 of 5 reports (40%), well ahead of the next concern. NHTSA has issued no recalls for this vehicle, so these are owner-reported concerns only. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the exterior lighting pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 5 complaints on record, top 4 components.
Source: NHTSA Office of Defects Investigation complaint database.
No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.
Showing 5 of 25 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| LI82.30-P-059239 | 2026-05-19 | Visibility/Wiper | Complaint There are several types of complaint about noises or poor windshield wiper… |
| LI82.10-P-078301 | 2026-04-16 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a… |
| LI82.10-P-078301 | 2026-03-09 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a… |
| LI82.10-P-078307 | 2026-02-24 | Exterior Lighting | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural… |
| LI82.10-P-078301 | 2026-02-24 | Exterior Lighting | Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 0 recall campaign(s) for this model year. Check your specific vehicle by VIN.