P0113 on a Mercedes-Benz: Causes, Fixes & Repair Cost
🟢 Low severity · drivable
Safe to drive — the engine just gets a wrong intake air temperature reading, which may cause slightly rich running.
What P0113 means on a Mercedes-Benz
On a Mercedes-Benz, P0113 means the intake air temperature (IAT) sensor is reporting a high-voltage, open-circuit signal. On many Mercedes models the IAT sensor is integrated into the mass air flow (MAF) sensor, so the code usually points to that sensor or its connector. The engine may run slightly rich until it is fixed.
Is P0113 common on Mercedes-Benzs?
P0113 is common on Mercedes vehicles as the MAF sensor ages and its sensing element gets contaminated with oil and dirt. Connector and wiring issues also appear on higher-mileage models. It is a sensor fault, not an engine failure.
Commonly reported on: C-Class, E-Class, GLC, GLE.
Symptoms
- Check engine light on
- Slightly rich running or worse fuel economy
- Possible hesitation or rough idle
- Often no noticeable symptoms
Common causes
- most common: Faulty MAF/IAT sensor
- common: Contaminated sensor element
- common: Loose or corroded connector
- less common: Damaged wiring to the sensor
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Clean the MAF/IAT sensor with MAF cleaner | Yes | $10–15 |
| Replace the MAF sensor | Yes | $180–400 |
| Repair the connector or wiring | Mechanic | $80–200 |
Frequently asked questions
Other common Mercedes-Benz codes
P0113 on other brands
Looking for the full (non-brand-specific) guide? See the P0113 code page →
Browse all Mercedes-Benz codes: Mercedes-Benz hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.