Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Complete Engine and Gearbox Maintenance

Model: Smart Smart 450 - Years 1998-2007
Part: Checks and maintenance

In this specific case, the video demonstrates the effectiveness of using nanotechnology additives to maintain the efficiency of the engine, gearbox, and fuel system; a bench test shows an increase in power and torque. Before changing the engine oil, add an engine cleaning additive and let it run at idle for at least 15 minutes; then proceed with the oil change (again adding a maintenance additive) and the filter cartridge. Next, replace the gearbox oil, also adding a maintenance additive. Finally, clean the throttle body with the appropriate spray and add a fuel system cleaning additive to the tank.

Updated on 7 February 2026 by ScegliAuto

Video tutorial

Related tutorials

Complete Engine and Gearbox Maintenance with Additives
Complete Engine and Gearbox Maintenance with Additives
Smart (2007-2015 / 451) The video shows a bench test to measure power and torque before maintenance: the aim is to demonstrate how the use of certain additives can improve e…
How to unlock the locked gearbox of the Smart Fortwo 453?
How to unlock the locked gearbox of the Smart Fortwo 453?
Smart (2014-2022 / 453) In the event that the automatic transmission of the Smart Fortwo 453 series is blocked, for example due to the complete discharge of the battery, and…
Reset of the engine oil change indicator (service) for the Smart Fortwo.
Reset of the engine oil change indicator (service) for the Smart Fortwo.
Smart (2014-2022 / 453) Today's instructions will allow us to reset the service warning for the regular maintenance of the engine oil change for the Smart Fortwo. First, let…

Other guides you may be interested in

    Frequently Asked Questions

    • Smart 1998-2007 - What is the problem with the Smart 450's steering angle sensor? Read answer

How to Replace the Front Headlamp Bulb on a Volkswagen Touareg

To perform this operation, release the bonnet using the lever and lift it to secure it with the prop rod. Then disconnect the battery terminals to protect any sensitive circuits. Locate the hook, which when rotated allows you to extract the headlamp. After removing the last bolts, you can take out the headlamp from its position and also disconnect the connectors at the back to completely remove it, allowing you to proceed with replacing the necessary components. Retrace the steps described for reassembly.

Watch the video!


by ScegliAuto

More videos