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A Mercedes-Benz exhaust is a full emissions system. Petrol models have catalytic converters, oxygen sensors and, on newer engines, a petrol particulate filter. BlueTEC and later diesels add a diesel particulate filter (DPF), AdBlue (SCR) injection and NOx sensors, and AMG models often have electronically controlled exhaust flaps. Common problems include cracked flexible joints, rattling heat shields, blocked DPFs from short trips, and AdBlue system warnings that count down to a no-start. At Orange Auto in Al Quoz and Nad Al Hamar we diagnose the system with live data and a visual check, then repair the actual fault.
We note the noise, smell or warning message and when it happens, cold, hot or under load.
We read engine and emissions faults and check oxygen sensor, DPF pressure, soot load and NOx sensor readings.
We check pipes, flexible joints, hangers, heat shields, clamps and the catalytic converter and filter housings for leaks and damage.
You get the cause and the repair options, from a clamp or heat shield fix to sensor or component replacement.
We repair or replace parts with genuine or quality OEM components and fit new gaskets and fixings.
Where needed we reset adaptations, run a DPF regeneration or prime the AdBlue system with diagnostic software.
We road test, rescan and confirm the warning lights and noises have gone.
Some exhaust warnings start in the engine, such as misfires damaging the catalytic converter. See Mercedes engine repair.
Diesel filters clean themselves on longer drives. Lots of short trips in city traffic can block them, so regular highway drives help.
An AdBlue fault message with a start countdown means the car may not restart once it reaches zero. Book a check straight away.
A smell of fumes in the cabin can mean a leak near the engine. Do not ignore it.
Loose heat shields are a common, often inexpensive, fix. We also check for rust. See Mercedes rust proofing.
Why is my Mercedes exhaust louder?Usually a leak at a joint, gasket or cracked flexible section.
Can a blocked DPF be cleaned?Often a forced regeneration clears it. If the filter is too blocked, we explain cleaning or replacement options.
What causes a NOx sensor fault?Sensors can fail with age and heat. We test the readings before replacing one.
Book your Mercedes-Benz exhaust check at Orange Auto in Al Quoz or Nad Al Hamar, or see all our Mercedes-Benz services. Call or WhatsApp us, or ask for a free quote using the form above.