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CriticalCommonEngine

Mercedes-Benz C-Class: M271/M271 EVO 1.8T Timing Chain Guide Disintegration

M271/M271 EVO 1.8T Timing Chain Guide Disintegration is a common engine fault on the Mercedes-Benz C-Class on the 2002–2014 cars, and we rate it critical. Putting it right costs $2,200 to $5,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 41 documented faults on the Mercedes-Benz C-Class.

Vehicle
Mercedes-Benz C-Class
Only on
Evolution
Engine
1.8L
Years
2002–2014
Fuel
petrol
System
Engine

This page covers the Mercedes-Benz C-Class as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Mercedes-Benz C-Class faults41 documented faults on this model

What you are looking at

The front of a dual overhead camshaft engine with the timing cover removed, exposing the timing chain and sprockets.Example of the part — not this vehicle

The front of a twin-cam engine with the timing cover off — chain, sprockets and guides.

Logansenf · CC BY-SA 4.0 · Wikimedia Commons

What goes wrong

The M271 (supercharged) and M271 EVO (turbocharged) 1.8-litre petrol engines fitted across W203, W204, and W205 C-Class suffer from premature timing chain guide failure. On W203, the balance shaft module primary chain stretches. On W204 and W205 EVO variants, the upper and lower plastic guide rails crack and shed debris into the oil, allowing chain slap and eventual valve timing loss. Failure can be catastrophic if the chain skips or snaps. Under-serviced engines and those running extended oil change intervals are at highest risk.

What you would notice

  • Rattling from front of engine on cold start, clearing after warm-up
  • Check engine light with camshaft position sensor codes (P0340, P0365)
  • Rough idle or loss of power
  • Oil consumption increase
  • Plastic debris visible on dipstick or oil filter

How to check it

Where to look. Front of engine block, behind timing cover

  1. Cold-start the engine and immediately listen for chain rattle from the timing cover.

  2. Rattle persisting beyond 30 seconds is a significant concern.

  3. Scan ECU for camshaft correlation or position faults.

  4. Check service records for chain replacement.

  5. Inspect oil for debris and note change intervals.

Parts involved: Timing chain.

What it costs to put right

$2,200 to $5,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Has the timing chain and guides been replaced?”
  • “Does it rattle on cold start?”
  • “What were the oil change intervals and what oil grade was used?”

Now check the Mercedes-Benz C-Class you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Mercedes-Benz C-Class buyer questions

Is m271/m271 evo 1.8t timing chain guide disintegration serious on a Mercedes-Benz C-Class?

We rate it critical and common on the Mercedes-Benz C-Class. The M271 (supercharged) and M271 EVO (turbocharged) 1.8-litre petrol engines fitted across W203, W204, and W205 C-Class suffer from premature timing chain guide failure. On W203, the balance shaft module primary chain stretches. On W204 and W205 EVO variants, the upper and lower plastic guide rails crack and shed debris into the oil, allowing chain slap and eventual valve timing loss. Failure can be catastrophic if the chain skips or snaps. Under-serviced engines and those running extended oil change intervals are at highest risk.

How much does it cost to fix on a Mercedes-Benz C-Class?

$2,200 to $5,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Mercedes-Benz C-Class years are affected?

Our research records this fault on the 2002–2014 Mercedes-Benz C-Class. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Cold-start the engine and immediately listen for chain rattle from the timing cover. Rattle persisting beyond 30 seconds is a significant concern. Scan ECU for camshaft correlation or position faults. Check service records for chain replacement. Inspect oil for debris and note change intervals. Look here: Front of engine block, behind timing cover