Change Car Glow Plugs Mercedes-Benz C-Class

Change Car Glow Plugs

Intermediate 1h30–3h30 ~150–350£
Estimated time 1h30–3h30
Estimated labour cost ~150–350£
Difficulty Intermediate
Vehicles
C-Class 1993-2001 6
  • 200 Diesel, -T Diesel (604.915)
  • 220 CDI, -T Diesel (611.960)
  • 220 D Diesel (604.910)
  • 220 Diesel, -T Diesel (604.910)
  • 250 Diesel Diesel (605.910)
  • 250 Turbodiesel, -T Diesel (605.960)
C-Class 2000-2007 8
  • 200 CDI, -T Diesel (611.962)
  • 200 CDI, -T, -Coupe Diesel (646.962)
  • 200 CDI, -T, -Coupe Diesel (646.963)
  • 220 CDI, -T, -Coupe Diesel (611.962)
  • 220 CDI, -T, -Coupe Diesel (646.963)
  • 270 CDI, -T Diesel (612.962)
  • 30 CDI AMG, -T, -Coupe Diesel (612.990)
  • 320 CDI, -T Diesel (642.910)
C-Class 2007-2014 13
  • 180 CDI BlueEFF, -T Diesel (651.913)
  • 200 CDI BlueEFF Diesel (646.812)
  • 200 CDI BlueEFF, -T Diesel (651.913)
  • 200 CDI, -T Diesel (646.811)
  • 220 CDI 4MATIC Diesel (651.912)
  • 220 CDI BlueEFF, -T, -Coupe Diesel (651.911)
  • 220 CDI, -T Diesel (646.811)
  • 250 CDI BlueEFF 4MATIC, -T Diesel (651.912)
  • 250 CDI BlueEFF, -T, -Coupe Diesel (651.911)
  • 300 CDI 4MATIC, -T Diesel (642.832)
  • 320 CDI 4MATIC, -T Diesel (642.961)
  • 320 CDI, -T Diesel (642.960)
  • 350 CDI, -T Diesel (642.830)
C-Class 2014-2022 11
  • 180 BlueTEC, -T Diesel (626.951 (R9M))
  • 180 D Diesel (654.916)
  • 200 BlueTEC, -T Diesel (626.951 (R9M))
  • 200 CDI Diesel (651.921)
  • 200 D Diesel (654.916)
  • 200 D Diesel (654.920)
  • 220 BlueTEC, -4MATIC, -T Diesel (651.921)
  • 220 D, -4MATIC, -T Diesel (654.920)
  • 220 D, -4MATIC, -T Diesel (654.920)
  • 250 BlueTEC, -4MATIC, -T Diesel (651.921)
  • 300 d, -4MATIC Diesel (654.920)

What is the role of Mercedes-Benz C-Class glow plugs?

Glow plugs are used in diesel engines to preheat the combustion chamber before starting, particularly in cold weather. Unlike petrol engines that use spark plugs to ignite the fuel, diesel engines rely on compression ignition. Modern glow plugs also remain active after starting to reduce emissions and noise during the warm-up phase.

When should you change your Mercedes-Benz C-Class glow plugs?

Generally, glow plugs last between 80,000 and 160,000 km. Symptoms of failing glow plugs include: difficulty starting in cold weather, white or grey exhaust smoke on start-up, rough idle during warm-up, the glow plug warning light remaining illuminated, and increased fuel consumption.

How do I know if the Mercedes-Benz C-Class glow plugs need changing?

Via the EOBD diagnostic system, faulty glow plugs will trigger fault codes (typically P0380–P0384 for glow plug circuit faults). Individual glow plug resistance can be measured with a multimeter (typically 0.5–2 ohms for a good plug).

Is it difficult to change Mercedes-Benz C-Class glow plugs?

Difficulty level 3/5: intermediate. Glow plugs can seize in the cylinder head over time due to heat and corrosion, making removal difficult and risking breakage. Key steps: warm the engine first, apply penetrating oil, use the correct glow plug socket, unscrew carefully (do not force — a broken glow plug requires specialist extraction).

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View your C-Class maintenance plan (keep the C-Class token) →

5 models covered

Model Year Range Engines covered Fuel
C-Class 1993-2001 1993-2001 180, -T, -LPG LPG,Petrol (111.920), 180, -T, -LPG LPG,Petrol (111.921), 200 Diesel, -T Diesel (604.915), 200 Kompressor T Petrol (111.956), 200, -T Petrol (111.941), 200, -T Petrol (111.952), 200, -T, -LPG LPG,Petrol (111.945), 220 CDI, -T Diesel (611.960), 220 D Diesel (604.910… Diesel, LPG, Petrol
C-Class 2000-2007 2000-2007 160 Kompressor Coupe, -LPG LPG,Petrol (271.921), 180 Kompressor, -T, -Coupe, LPG LPG,Petrol (271.946), 180, -T, -Coupe, -LPG LPG,Petrol (111.951), 200 CDI, -T Diesel (611.962), 200 CDI, -T Diesel (611.962), 200 CDI, -T Diesel (646.962), 200 CDI, -T, -Coupe Diesel (646.962), 200 … Diesel, LPG, Petrol
C-Class 2007-2014 2007-2014 180 BlueEFF, -LPG LPG,Petrol (274.910), 180 CDI BlueEFF, -T Diesel (651.913), 180 CGi, -T, -Coupe, -LPG LPG,Petrol (271.820), 180 Kompressor BlueEFF, -T, -LPG LPG,Petrol (271.910), 180 Kompressor, -T, -LPG LPG,Petrol (271.952), 200 CDI BlueEFF Diesel (646.812), 200 CDI BlueEFF, … Diesel, LPG, Petrol
C-Class 2014-2022 2014-2022 160 Petrol (264.915), 160, -T Petrol (274.910), 180 BlueTEC, -T Diesel (626.951 (R9M)), 180 D Diesel (654.916), 180 Petrol (264.915), 180, -T, -LPG LPG,Petrol (274.910), 200 BlueTEC, -T Diesel (626.951 (R9M)), 200 CDI Diesel (651.921), 200 D Diesel (654.916), 200 D Diesel (654.9… Diesel, Electricity, LPG, Petrol
C-Class 2021-2025 2021-2025 180 EQ Boost 48V (MHEV),Petrol (254.915), 200 d EQ Boost 48V (MHEV),Diesel (654.820), 200 EQ Boost, -4MATIC 48V (MHEV),Petrol (254.915), 220 d EQ Boost, -4MATIC 48V (MHEV),Diesel (654.820), 300 d EQ Boost, -4MATIC 48V (MHEV),Diesel (654.820), 300 e Electricity,Petrol (254.920), … 48V (MHEV), Diesel, Electricity, Petrol

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