Is your Mercedes S-Class showing signs of engine knocking noise? GarageNation specialises in diagnosing and repairing this problem on the Mercedes S-Class (Sedan, Petrol / Diesel) in Hyderabad. Urgency: Immediate. This is an immediate concern — do not continue driving until diagnosed. Estimated repair cost: ₹5,000 – ₹2,00,000.
The Mercedes S-Class uses a 3.0 M256 inline-6 EQ Boost (435 bhp S500) and is classified as a sedan. Based on our workshop experience with Mercedes S-Class in Hyderabad: AIRMATIC air suspension compressor failure — most costly S-Class common repair. Mercedes S-Class models are among the brands we see most frequently for engine knocking noise repairs.
Change engine oil every 10,000 km with the correct viscosity — degraded oil loses film strength and bearing clearances widen within one missed service.
Is engine knocking serious?
A deep metallic knock is one of the most serious engine sounds — it means bearing clearances have opened up and the crankshaft is hitting the bearing shells. Continued driving risks a spun bearing or broken connecting rod (₹1,00,000–₹2,00,000 repair or write-off). Stop immediately, check the oil level, and call GarageNation for free towing: +91 8106316369.
What causes engine knock on cold start?
Cold-start knock that clears after warm-up is almost always the timing chain tensioner losing hydraulic pressure overnight (oil drains back from the tensioner). This is a 'soon' repair (not emergency), but delaying it risks the chain jumping a tooth and causing catastrophic valve/piston damage. Most common on BMW N20/N46, VW EA888, and Maruti K-Series.
What does Mercedes S-Class engine knocking noise repair cost in Hyderabad?
Mercedes S-Class engine knocking noise repair at GarageNation ranges from ₹5,000 – ₹2,00,000. The exact cost depends on which component is at fault — we diagnose first and provide a written quote before any repair. Free pickup from your location across Hyderabad.
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