What is AdBlue?

If you own a diesel car that has been built in the last few years, chances are you need to use AdBlue. AdBlue is an additive that reduces NOx emissions by being sprayed into the exhaust gasses. Multiple Mercedes-Benz models such as the E-class W212 S212 A207 C207 W213 S213 A238 C238 E220 E250 E300 E350 C-class W205 S205 C205 A205 C200 C220 C250 BlueTEC and BlueEfficiency C300 S-class W221 W222 S350, GLE W166 ML350 and G350, GLC C253 and so on are equipped with BlueTec technology, which utilises AdBlue Diesel Exhaust Fluid (DEF).

Ofcourse Mercedes-Benz manufacturer isnt't the only who does use DEF (Adblue) system for their cars it includes Audi A3 A4 A5 A6 A7 A8 Q3 Q5 Q7 Q8 VW Touareg Touran Sharan Golf Amarok Seat Leon Skoda Octavia and many other different models

There are many different messages that will appear on your Mercedes-Benz instrument cluster which pertain to your AdBlue levels and so forth. These include:

  • Refill AdBlue at Workshop
  • AdBlue Check Additive See Operator’s Manual
  • AdBlue Range
  • Engine Start Not Permitted (AdBlue Empty)
  • Check AdBlue No engine Start Possible in XXX miles/km.
  • Refill AdBlue See Owner’s, Manual
  • AdBlue Should be refilled at the next opportunity

Importantly, if the AdBlue levels reach zero, you will not be able to start your engine. You must be aware of this to avoid being stuck somewhere you don’t want to be. In this instance, you will get a message saying “No engine start possible.”

AdBlue used in cars from the Mercedes range is developed by a European company called Verband der Automillindustrie (VDA). This company is recommended for your Mercedes car, but you can buy AdBlue from many different manufacturers if you need to, as it is produced by multiple companies. A commonly recommended alternative for Mercedes-Benz owners is BlueDEF AdBlue.

Where to buy AdBlue for your Mercedes-Benz?

There are a number of places or options available to purchase AdBlue, whether you are topping up before your journey or on the go. These include:

• Service Stations
• Dealerships
• Retail stores

Some service stations have AdBlue on pump and sell bottles in many different sizes from 1L to over 10L, depending on how much you need. Dealerships also have these options. Retail stores will usually just have the bottles available. It is advisable to check your options if you are setting off on a long journey. Always pay attention to the AdBlue warning light so you do not get caught short on your journey.

How long does AdBlue last?

5 gallons of AdBlue will typically give a range of 10-15,000 miles, depending on driving habits and road conditions.

mercedes adblue

It is very easy to add AdBlue to your Mercedes-Benz car.

1. Open your fuel door lid.
2. Note the blue cap – this is where you refill the AdBlue. Take the cap off and put it in a safe place.
3. Add the required amount of AdBlue. If using a bottle, many of these come with filling attachments such as nozzles or filling caps. Just add the AdBlue until you have emptied the bottle or the liquid is visible.
4. Replace the blue cap.

Very importantly, make sure that AdBlue is added to the correct tank. Do not mix the AdBlue with your diesel as this will cause problems with your engine. Do not mix AdBlue with water – it is at the right concentration and by diluting it you will reduce the quality of the AdBlue. AdBlue is not a lubricant or additive.

Mercedes benz refill adblue

Typically, the capacity of a Mercedes-Benz BlueTec AdBlue tank is 5 gallons/22 litres. It is not necessary to add AdBlue every time you fill up with diesel, but keep an eye on your warning lights.

Recommended AdBlue service levels:

• Refill every 10K miles
• Drain tank and refill every 20K miles.

Don’t get stranded in an unfamiliar place – make sure you top up with AdBlue to keep your Mercedes-Benz running as smoothly as the day you bought it.