Mercedes C250 CGI Oil Burning & Oil Consumption Prevention Kit (M271 1.8)

Mercedes C250 CGI Oil Burning Symptoms

• Blue/grey smoke from the exhaust
• Frequent oil top-ups, oil warning
• Chain rattle on cold start
• Rough idle, power loss

Mercedes C250 CGI M271 Oil Burning and Oil Consumption Problem

The M271 1.8 engine of the Mercedes C250 CGI (W204 C250 CGI (M271 EVO), 204 hp) is known for oil consumption. The manufacturer considers 1 litre per 6,000-7,000 km normal; however, because of valve guide/piston ring wear, excessive consumption of 2-3 litres per 8,000 km can occur. The oil passes into the combustion chamber and burns.

Oil Burning Prevention Kit for the Mercedes C250 CGI

• C250 CGI that consumes oil → 6 L Brava Extreme 9000 5W50 + A980 NanoComplex — a thicker film that noticeably reduces consumption.
• No consumption / protection → 6 L Brava Extreme 9000 5W40 (MB 229.5) + A980 NanoComplex.

How Does A980 NanoComplex Reduce Oil Consumption?

It strengthens the oil film and reduces leakage around the rings and valves, cuts oil passage into the combustion chamber and noticeably reduces consumption.

Which Motor Oil for the Mercedes C250 CGI?

The M271 requires a fully synthetic oil approved to MB 229.5. At high mileage 5W30 is not enough; 5W50 if it consumes oil, 5W40 if it does not. Both are offered in the kit as Brava Extreme 9000 fully synthetic.

Mercedes C250 CGI Oil Capacity

• Engine: M271 1.8 (204 hp)
• Model year: 2008-2014 (W204 body)
• Oil capacity: ~5.5 L (with filter; ~6.5 L in total)
• Kit: 6 L Extreme 9000 + A980 NanoComplex 450 ml

Other Common Problems of the Mercedes C250 CGI M271

• Timing chain stretch / tensioner: The best-known chronic problem of the M271. The chain stretches over time and the tensioner weakens, producing a rattle when cold and timing drift; if neglected, severe engine damage follows. The chain/tensioner must be renewed at an authorised service centre; correct, clean oil preserves chain tension and life.
• Intake manifold flaps: These can fail on the M271, triggering the engine warning light and power loss.
• Carbon/soot build-up (CGI direct injection): Soot on the valves; reduced by injector / fuel system cleaning.

Note: This kit targets the oil side of the Mercedes C250 CGI; mechanical work such as chain stretch is a job for an authorised service centre.

Complete Maintenance and Additive Recommendation for the Mercedes C250 CGI

• Oil consumption & protection: This kit — Extreme 9000 (5W50/5W40) + A980 NanoComplex
• Fuel system & clean combustion: Brava S50 Fuel Additive
• Injector / carbon reduction: Brava A700 Injector System Cleaner
• Internal engine sludge cleaning: Brava A900 Engine Internal Cleaner

Not Driving a Mercedes C250 CGI?

Models sharing the same Mercedes M271 (1.8) engine:

• Mercedes C180 Oil Burning Kit
• Mercedes C200 Oil Burning Kit
• Mercedes E200 Oil Burning Kit
• Mercedes E250 CGI Oil Burning Kit
• All Oil Burning & Oil Consumption Kits

Frequently Asked Questions

At how many km does the Mercedes C250 CGI start burning oil?

On the M271 C250 CGI, the manufacturer considers 1 L per 6,000-7,000 km normal; with valve/ring wear it can rise to 2-3 L per 8,000 km.

Which oil does the Mercedes C250 CGI use?

A fully synthetic oil approved to MB 229.5; 5W40 at high mileage, 5W50 when consuming oil. The kit contains Brava Extreme 9000 (5W50/5W40) + A980.

What is the oil capacity of the Mercedes C250 CGI?

~5.5 litres with the filter (~6.5 in total). The kit contains 6 litres.

What does a cold rattle on the Mercedes C250 CGI indicate?

It is usually timing chain stretch / a weak tensioner; have it checked at an authorised service centre. The correct oil preserves chain life.

Will this kit stop oil burning on the Mercedes C250 CGI?

A980 plus the correct viscosity noticeably reduces consumption; unless there is severe valve/ring damage, most cars come close to normal.