Mercedes-Benz Cambelt change made easy

• Mechanic will remove or loosen the components required to gain access to the cover. This may also involve removing a wheel as well, so do not be alarmed!
• Mechanic will then lock the camshafts and crankshaft in place with timing pins, before removing the old belt and associated guides and tensioner.
• Mechanic will also drain the cooling system and remove the water pump if it is driven by the belt
• Once a cleanup has been done, the mechanic will renew the components and finally fit the new belt.
• Any components removed will be put back in place, the cooling system replenished and the engine started and tested.
• The cooling system will then be bled of air and the vehicle road tested.

Sadly in 99% of cases you will only know if there is an issue with the cambelt when it breaks! This can occur at any time, at any speed and usually at the most inconvenient time and place. This is why manufacturers give recommended replacement intervals, both in terms of age and mileage. It is preventative maintenance that should never be overlooked.

On average, cambelt change times can range from 1.5 to over 5 hours with an average of 2.7 hours. The time that the job takes will depend on a number of factors, like your vehicle's make and model, year, as well as other factors. Select your car at the top of this page for information on job time and cost for your vehicle through ClickMechanic.

The lifespan of a cambelt is generally between 5 to 8 years, depending on the manufacturer. Every vehicle which has an engine that uses a timing belt, needs to have this done as part of the scheduled maintenance. Therefore always remember to replace the timing belt when stipulated in the car manufacturer's service schedule.

If your car is around the age of normally needing a scheduled cambelt change, and you have no record of the job ever having been done, it would be wise to get the belt replaced rather than chancing it.

Each manufacturer will give a recommended replacement interval for the timing belt on its vehicles. This information is usually available in the Owner Handbook, however if you do not have this in your possession, we are happy to advise accordingly.

If you have purchased a second hand vehicle and it has no timing belt change history, such as a garage invoice, then it is important to err on the side of caution and have it replaced as soon as possible,

On many engines, the water pump is driven by the belt as well. If this is the case, it is imperative to have it replaced at the same time. There are two reasons for this, firstly, the water pump is a pulley and bearing that forms part of the circuit the belt travels around and should it fail, then the belt will come off and that is the same as it breaking. Also, water pumps are prone to seizing, which again will break the belt.

The second reason is that should the water pump fail (and not damage the belt etc) and require replacing, then the timing belt would have to be renewed at the same time, so its best to have a new one fitted as a preventative course of maintenance.

Most mechanics will not carry out the work unless the pump is replaced in the situation as they know the consequences!

If your car is fitted with a timing belt (and not a chain), then the replacement needs to be carried out at the time stipulated by the manufacturer. This could be between 5 - 7 years or 60,000 to 100,000 miles. So in reality, it is a very common jobs as all cars equipped as such need to have this done.

You cannot generally check to see if a belt has been replaced recently or not as not only is access difficult, what you can see doesn’t give clear indication of its age.

How long a cambelt lasts will depend on a number of factors, generally this can range anywhere from 40,000 miles to 100,000 miles, or indeed a number of years. Manufacturers give recommended replacement intervals, both in terms of age and mileage. It is preventative maintenance that should never be overlooked. Intervals will depend on the vehicle's make and model.

On average, the cost for a cambelt or timing belt replacement is £300. A water pump replacement generally costs between £115 and £375.

You may hear a clicking or ticking sound coming from the engine. You may also constantly hear knocking or slapping noises if the timing belt tensioner is unfastened and the timing belt is no longer tensioned correctly. In the worst case scenario you may find that you can't start your car at all if the cambelt has come off or has broken.

Yes, many local garages are able to offer collection and delivery for a cambelt change on your Mercedes-Benz. With ClickMechanic collection & delivery is free if your vehicle is drivable. Once booked a mechanic will pick up the vehicle on the day and time of your choice, do the work, and return the vehicle at a time convenient to you. Simply enter your vehicle registration number and postcode to get an upfront price for a cambelt change on your Mercedes-Benz.

Typically no, mobile mechanics cannot do a cambelt or timing belt change at your home or office on your Mercedes-Benz, because the repair may need to be carried out on a ramp, and may need specialist equipment. Also, the time involved to carry out the work may make it more practical to carry out the work at a garage. However, if there are still some doubts as to what repair is needed, mobile mechanics may be able to carry out a diagnostic inspection at your home or office on your Mercedes-Benz and then take the car to a garage to carry out the cambelt change.