Mercedes ATF, Engine Oil, Hydralic fluid, etc.

Coolant, antifreeze, radiator antifreeze - all the same?

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The (water) cooling circuit in the car is of central importance for the function of the vehicle, so that the coolant plays a central role alongside the other operating fluids such as engine oil, brake fluid, etc.

But what is the difference between coolant and antifreeze? Is it all the same?

We will explain it to you:

The fluid that performs the function of heat transport and at the same time protects against corrosion and frost in your vehicle's cooling circuit is correctly called coolant.

Is there a difference between coolant and antifreeze?

The answer is yes. It is simpler than you might think. While coolant is called the finished liquid that works in the cooling circuit, coolant in the true sense of the word is the component of the coolant that adds the important functions of protection against freezing, rust and boiling to conventional water. A mixture of antifreeze and water thus produces the finished coolant.

Antifreeze is offered either as a concentrate - these are used exactly as just explained - and as a finished mixture "Ready Mix", "Premix" or "ready to use". These are coolants that are ready to be filled directly into the radiator and do not need to be mixed with water.

Find the right antifreeze for every vehicle in the ATO24 Online Shop! What are the differences?

As a rule of thumb, coolants are often distinguished by their color and selected for use. This procedure does not always lead to the wrong result, but it is not technically correct and may well lead to you choosing the wrong antifreeze for your vehicle.

The wrong antifreeze selected. What are the consequences?

The consequences of the wrong antifreeze in the cooling circuit of your car are difficult to estimate, but can be negative or even fatal. Since antifreeze of different specifications differ in their chemical composition and mixing different combinations can lead to unwanted reactions of the fluids, you should follow a systematic and correct procedure when choosing your antifreeze. Far from it, the different operating regulations are adapted to the engine requirements because, regardless of the mixing of different antifreeze, engines have different demands on the chemical properties of a coolant.

The right choice: Buy antifreeze to specification!

We have found that it is essential to choose an antifreeze according to the correct specification provided by the vehicle manufacturer and not to rely on inaccurate distinguishing features, such as color in particular.

How do I choose the right antifreeze for my car?

Similar to the operating regulations for engine oils, vehicle manufacturers have in the past introduced a number of manufacturer-specific but also cross-manufacturer specifications that you can use as a guide. To find out which coolant specification is required for use in your vehicle, please refer to your vehicle manual. In addition, the ATO24 team offers free expert advice if you are not sure which coolant to use. Just contact us via the indicated ways.

The probably most common coolant specifications are the G-standards. These were developed independently by the car manufacturer Volkswagen and the chemical company BASF. Some standards are identical, others have no equivalent in the other system. The VW coolant specifications range from G11 to G12, G12+ and G12++ to G13. BASF, the manufacturer of the well-known Glysantin antifreeze, leads its classification as follows:

  • Glysantin G48 (corresponds to VW G11)
  • Glysantin G30 (corresponds to VW G12+)
  • Glynsatin G40 (corresponds to VW G12++)
  • Glysantin G05 (particularly suitable for many cast iron engines)
  • Glysantin G33 (suitable for most Peugeot and Citroen vehicles)
  • Glysantin G34 (product for many GM and Opel vehicles)

A large number of vehicle manufacturers orient themselves to these specifications. If you cannot find any of these specifications in your vehicle manual, you may find one of the manufacturer's internal regulations there:

Some manufacturers prescribe an explicit product for use in their vehicles. In manuals of Renault vehicles you will often find the reference to Renault Glaceol RX Type D. In addition to the designation, manufacturers often include part numbers that refer to explicit OEM products, such as

Other manufacturers also refer to a certain chemical composition of the coolant, which must be observed. Coolants are often classified in the following gradations:

  • free from nitrite, amine, phosphate
  • free from amine, phosphate, borate, silicate
  • free from amine, phosphate, borate, 2-ethylhexanoic acid

The car manufacturer Opel often prescribes the use of a so-called low-hybrid "Lobrid" coolant for modern vehicles.

You can read much more about the topic coolant, for example an answer to the question how to mix coolant correctly and which water to use for this, in our ATO24 blog article about coolants.

Buy Mercedes-Benz OEM products for your Mercedes at low prices!

What is obvious for the quality-conscious driver when choosing the right engine oil, transmission oil or coolant? - The manufacturer's OEM product! OEM stands for "Original Equipment Manufacturer" and in the automotive industry means equipment and spare parts that the vehicle manufacturer sells under his own brand.

ATO24 offers you OEM Mercedes-Benz lubricants for your Mercedes!

In ATO24's online store you can find a variety of high-quality Mercedes-Benz OEM products of the following categories:


Buy OEM engine oil for every Mercedes-Benz at low prices!

With the Mercedes-Benz engine oils 5W-30 MB 229.52, the Mercedes-Benz 5W-30 MB 229.51, the Mercedes-Benz engine oil 5W-40 MB 229.5 as well as the Mercedes-Benz AMG engine oil 0W-40, the ATO24 range covers all Mercedes-Benz engines in modern passenger cars: 


The Mercedes-Benz MB 229.5 approval is suitable for use in a variety of Mercedes gasoline engines. These include in particular large-volume 8-cylinder engines such as the M 152, M157 or M275, which can be found in Mercedes AMG vehicles such as the SL 55 AMG R 172 or various "63 AMG" engines such as the E 63 AMG, S 63 AMG, CLS 63 AMG or GLE 63 AMG as well as in a variety of "500" models. The MB 229.5 approval can also be frequently used for 4-cylinder petrol engines such as the M 271 (among others in E250 BlueEfficency, C200 BlueEfficency vehicles). 

The Mercedes-Benz MB 229.51 approval is suitable for use in gasoline and diesel engines with and without particulate filter. Prerequisite for this engine oil release is the so-called "Low SPAsh" property. Engine oils with MB 229.51 approval can therefore also be used in gasoline engines with OPF (gasoline particulate filter) such as the M256 (for example in Mercedes-Benz E-Class E 53 AMG or S Class S 500). In addition, they are suitable for use in all modern diesel engines without DPF (diesel particulate filter) and a large number of diesel engines with particulate filter: It can be used for the four-cylinder diesel engines OM 651, OM 646, OM 640 and OM 629 as well as for some of the six-cylinder diesel engines OM 642 (depending on year of manufacture, please refer to the vehicle manual!).

The Mercedes-Benz MB 229.52 approval was developed as a further development of the MB 229.51 approval in order to respond to the increased demands on the engine oil used, which in particular bring with them new emission standards. The MB 299.52 approval was used for the first time in the OM 642 Mercedes-Benz 6-cylinder diesel engine. Engine oils with MB 229.52 approval can be used in almost all units that previously required an oil with MB 229.51 operating instructions.

To select the correct Mercedes-Benz engine oil, please refer exclusively to your vehicle manual or Mercedes-Benz sheet 223.2.

Mercedes-Benz automatic and manual transmission oils for 4G-Tronic, 5G-Tronic (NAG1), 7G-Tronic (NAG2) and 9G-Tronic (NAG3) for ATO24

In the ATO24 online store you will find the right automatic transmission oil for every Mercedes-Benz with automatic transmission:


  • Mercedes Benz automatic transmission oil MB 236.6
    historical Mercedes-Benz automatic transmission oil, which replaces older MB releases for automatic transmissions
  • Mercedes-Benz automatic transmission oil MB 236.10
    for 4 and 5-speed automatic transmissions without controlled torque converter lock-up clutch 722.3, 722.4, 722.5 (4G-Tronic) as well as 5-speed automatic transmissions with controlled torque converter lock-up clutch 722.7 (Mercedes 5G-Tronic or NAG1 automatic transmission)
  • Mercedes-Benz automatic transmission oil MB 236.14
    for 5-speed automatic transmission with controlled torque converter lock-up clutch 722.6 (NAG1) as well as 7-speed automatic transmission 722.9 (except code A89 or up to transmission number 2.834.526) or 7G-Tronic / NAG2
  • Mercedes-Benz automatic transmission oil MB 236.15
    for 7-G automatic transmission 722.9 (with code A89 or from transmission number 2.834.527) or 7G-Tronic-Plus / NAG2-FE / NAG2+ 
  • Mercedes-Benz automatic transmission oil MB 236.17
    for 9-speed automatic transmission 9G-Tronic / NAG3 725.0 and 725.1 4 MATIC

In order to determine the correct automatic transmission oil for your Mercedes-Benz, please refer to the information in your vehicle manual or the operating instructions sheet MB 231.1.

Buy Mercedes-Benz coolant for each model from ATO24 at a reasonable price

The ATO24 range includes Mercedes-Benz coolants covering all Mercedes-Benz passenger car models of all years of manufacture: