2014 Mercedes S class coolant

Blub123

So got the message to top up coolant.

Went to Halfords, and their manual recommends comma xstream g40.

So went to dilute 50/50 with deionised water and the anti freeze is pink in colour.

The antifreeze I have in the car is green/blue in colour.

What to do? I presume mixing is a major no no?

Thanks

Do not use ever deionised water inside car cooling system! Only distilled water is pure enough for that purpose.

You are the first car owner? I ask because it looks like somebody used cheap and wrong coolant before

Blub123

https://www.boards.ie/discussion/comment/118309147#Comment_118309147

No, am 2nd owner. Bought about 4 months ago.

So am I looking at trip to the garage and complete flush?

Also where would you get distilled water?

Its due a service end of January.. Any issue with diluting the existing a little ( top up) with distilled water until then.?

Thanks

Because there is already garbage (wrong coolant) it can not make more harm to the system to use it short time. Damage is already done by previous owner. Soon as you get opportunity, flush that out. Only draining is not an option, need to get all that old out and may be use some additive to get system clean. It is very important to have a clean cooling system because only then it can cool properly your car on extreme conditions (towing, speeding, mountains etc). Distilled water is relative cheap but very hard to get here in Ireland.

Atlantic Dawn

I always go main dealer route for coolant regardless of brand, generally it's not a whole lot more, sometimes actually cheaper than the likes of Halfords for a full fill.