Exhaust smells started coming through the air vents while driving, after the catalytic converter was changed. I discovered through my own inspection, that exhaust was leaking at the connection point between the catalytic converter and the turbocharger. The fumes were entering the airflow for the passenger cabin through the cabin air intake drain valve because it is in the engine compartment. I realized that this is pouring carbon monoxide into the cabin ventilation system.
| VIN Pattern | WD4PF1ED*KT****** |
| Drive Type | 4x2 |
| Gross Vehicle Weight Rating | Class 2H: 9,001 - 10,000 lb (4,082 - 4,536 kg) |
| Manufacturer | MERCEDES-BENZ, AG |
| Make | MERCEDES-BENZ |
| Model | Sprinter |
| Model Year | 2019 |
| Series | C2500/C3500 |
| Body Class | Van |
| Vehicle Type | MULTIPURPOSE PASSENGER VEHICLE (MPV) |
| Engine Model | M 274 with Brake Assist |
| Engine Configuration | In-Line |
| Engine Manufacturer | DAG |
| Engine Displacement (CC) | 2000 |
| Engine Displacement (CI) | 122.047 |
| Primary Fuel Type | Gasoline |
| Transmission Style | Automatic |
| Electronic Stability Control | Standard |
| Traction Control | Standard |
| Blind Spot Monitoring System | Optional |
| Rear Visibility System | Standard |
| Daytime Running Light | Standard |
| Tire Pressure Monitoring System (TPMS) | Indirect |
| Keyless Ignition | Standard |
| Auto Reverse System | Standard |
| Front Air Bags | 1st Row (Driver and Passenger) |
| Side Air Bag | 1st Row (Driver and Passenger) |
| Curtain Air Bags | 1st Row (Driver and Passenger) |
| Seat Belts | Manual |
| Seat Belt Pretensioner | Yes |
| Other Restraint System Info | SA5 (airbag for driver) + SA6 (airbag for co-driver) + [SH1 (thorax side airbag driver) or SH2 (thorax side airbag for driver and co-driver)] + SH9 (driver and co-driver window airbags) + type 2 seat belts with load limiters and pretensioners. |
| Plant City | CHARLESTON |
| Plant State | SOUTH CAROLINA |
| Plant Country | UNITED STATES (USA) |