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Fluid level checks Mercedes-Benz C-Class 2000 - 2007 Petrol C180 - 1.8

OnDemand step-by-step maintenance & repair BETA

Mercedes-Benz C-Class 2000 - 2007  | C180 - 1.8 Fluid level checks

  • time 5 to 30 minutes
  • difficulty 1

Underbonnet check points

1.8 litre petrol A Engine oil level dipstick B Engine oil filler cap C Coolant expansion tank D Brake/clutch fluid reservoir (under cover) E Screen washer fluid reservoir
2.2 litre petrol A Engine oil level dipstick B Engine oil filler cap C Coolant expansion tank D Brake/clutch fluid reservoir (under cover) E Screen washer fluid reservoir

Engine oil level

1 • Make sure that the car is on level ground.
2 • The oil should be at normal operating temperature.
3 • The engine should have been switched off for at least 5 minutes.
HINT: If the oil is checked immediately after driving the vehicle, some of the oil will remain in the upper engine components, resulting in an inaccurate reading on the dipstick.

The correct oil

4 Modern engines place great demands on their oil. It is very important that the correct oil for your car is used.
Engine oil grade Multigrade engine oil with a viscosity suited to the ambient temperature (see illustration) approved in accordance with MB sheets 229.1 or 229.3
Engine oil viscosity chart

Car care

5 • If you have to add oil frequently, you should check whether you have any oil leaks. Place some clean paper under the car overnight, and check for stains in the morning. If there are no leaks, then the engine may be burning oil, or the oil may only be leaking when the engine is running.
6 • Always maintain the level between the upper and lower dipstick marks. If the level is too low, severe engine damage may occur. Oil seal failure may result if the engine is overfilled by adding too much oil.
Some models, have a red cap fitted to the dipstick tube and NOT a dipstick. On these models, the oil is checked on the multifunction display unit on the Instrument panel. By pressing the up-and-down buttons on the multifunction steering wheel repeatedly, the ENGINE OIL LEVEL, MEASURING NOW! will appear on the display. Follow the instructions shown to achieve the correct oil level.
On models with a dipstick fitted, the dipstick cap is coloured red for easy identification (see Underbonnet check points for exact location). Withdraw the dipstick, and then use a clean rag or paper towel to wipe the oil from it. Insert the clean dipstick into the tube as far as it will go, then withdraw it again.
Note the level on the end of the dipstick, which should be between the upper (MAX) and lower (MIN) mark. Oil is added through the filler cap aperture. A funnel may help to reduce spillage.
Unscrew the cap and place some cloth rags around the filler cap aperture, then top-up the level. Add the oil slowly, checking the level on the dipstick frequently. Avoid overfilling (see Car care). If you need to renew the oil and filter, click below

Coolant level

Warning: Do not attempt to remove the expansion tank pressure cap when the engine is hot, as there is a very great risk of scalding. Do not leave open containers of coolant about, as it is poisonous.

Car care

7 • With a sealed-type cooling system, adding coolant should not be necessary on a regular basis. If frequent topping-up is required, it is likely there is a leak. Check the radiator, all hoses and joint faces for signs of staining or wetness, and rectify as necessary.
8 • It is important that antifreeze is used in the cooling system all year round, not just during the winter months. Don’t top up with water alone, as the antifreeze will become diluted.
Antifreeze type MB 325.0 000 989 08 25 or 000 989 21 25
The coolant level varies with the temperature of the engine. When the engine is cold, the coolant level should be up to the level marker inside the filler neck of the expansion tank.
If topping-up is necessary, wait until the engine is cold. Slowly unscrew the cap to release any pressure present in the cooling system, and remove the cap.
Add a mixture of water and the specified antifreeze to the expansion tank until the coolant level is halfway between the level marks. Refit the cap and tighten it securely. Should you need to replace the coolant, click below

Brake and clutch fluid level

Note: On manual transmission models, the fluid reservoir also supplies the clutch master cylinder with fluid.

Before you start

9 Make sure that the car is on level ground.
10 Cleanliness is of great importance when dealing with the braking system; so take care to clean around the reservoir cap before topping-up. Use only clean brake fluid.

Safety first!

11 • If the reservoir requires repeated topping-up, this is an indication of a fluid leak somewhere in the system, which should be investigated immediately.
12 • If a leak is suspected, the car should not be driven until the braking system has been checked. Never take any risks where brakes are concerned.
Warning: Brake fluid can harm your eyes and damage painted surfaces, so use extreme caution when handling and pouring it. Do not use fluid which has been standing open for some time, as it absorbs moisture from the air, which can cause a dangerous loss of braking effectiveness.
The MIN and MAX marks are indicated on the reservoir. The fluid level must be kept between the marks at all times. If topping-up is necessary, first wipe clean the area around the filler cap to prevent dirt entering the hydraulic system.
If topping-up is necessary, first wipe clean the area around the filler cap to prevent dirt entering the hydraulic system. Unscrew and remove the reservoir’s cap.
Carefully add fluid, taking care not to spill it onto the surrounding components (use a funnel). Use only DOT 4 Plus; mixing different types can cause damage to the system. On completion, securely refit the cap and wipe away any spilt fluid.

Washer fluid level

13 • Screenwash additives not only keep the windscreen clean during bad weather, they also prevent the washer system freezing in cold weather – which is when you are likely to need it most. Don’t top-up using plain water, as the screenwash will become diluted, and will freeze in cold weather.
Caution: On no account use engine coolant antifreeze in the screen washer system – this may damage the paintwork.
The screenwash fluid reservoir is located on the left-hand side (as seen from the driver’s seat) of the engine compartment, behind the headlight. Pull up the filler cap to release it from the reservoir.
When topping-up the reservoir, a screenwash additive should be added in the quantities recommended on the bottle. It could also be time to replace the wiper blades. For details, click below
- Close + Open

Wiper blade replacement

Note: It is possible to park the wipers in a Service/Winter position with both wipers pointing upwards to allow unrestricted removal of the blades. To do this, operate the wipers within 10 seconds of switching off the ignition. The wiper arms can now be lifted away from the windscreen.
Check the condition of the wiper blades; if they are cracked or show any signs of deterioration, or if the glass swept area is smeared, renew them. For maximum clarity of vision, wiper blades should be renewed annually, as a matter of course.
To remove a windscreen wiper blade, pull the arm fully away from the screen until it locks. On standard wipers, swivel the blade through 90º, press the locking tab with your fingers, and slide the blade out of the hooked end of the arm.
Where applicable, don’t forget to check the tailgate wiper blade as well. To remove the blade, depress the retaining tab and slide the blade out of the hooked end of the arm.

Power steering fluid level

14 Park the vehicle on level ground and set the steering wheel straight-ahead. The engine should be turned off; for the check to be accurate, the steering must not be turned once the engine has been stopped.
Caution: The need for frequent topping-up indicates a leak, which should be investigated immediately.
15 The power steering fluid reservoir is located at the front right-hand side of the engine on 1.8 litre petrol models and at the front left-hand side of the engine on all other models (see illustration) .
Power steering fluid reservoir – 1.8 litre engine
16 A dipstick is incorporated in the filler cap. Wipe clean the top of the fluid reservoir, then unscrew and remove the reservoir cap and dipstick.
17 Wipe the dipstick clean, then screw the reservoir cap fully back into position. Unscrew the cap once more, remove the dipstick and check the fluid level, which should be between the MAX and MIN marks. Note: There are two sets of marks – 20° marks are for checking the fluid when cold, and the 80° marks for fluid at operating temperature (see illustration) .
Power steering fluid dipstick markings
18 Top-up the fluid level to the MAX mark, using the specified type of fluid (do not overfill the reservoir), then refit and tighten the filler cap.
Power steering fluid MB 345.0 hydraulic fluid A 001 989 2403
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