I recently had my cooling system serviced by a Mercedes Benz shop.When I got the car back I noticed that they had indeed serviced the cooling system but the antifreeze solution is bright green.This tells me that they did not put in the MB antifreeze but the over the counter prestone. After using the search feature im not sure whether to take it back and have them re do the service to the cooling system or leave it as is.Im sure that they will claim that it will cause no problems. What do you guys think..make a hassle or leave it be?
Im also thinking of changing it to MB antifreeze myself...does anyone know exactly where the block drain plug for the cooling system is located on my 1999 C43?
Any suggestions will be highly appreciated.
Thabnks for your time
Phillip
1999 C43
35,000 miles

You should use MB antifreeze, Zerox G-05, which meets the MB spec, or Dexcool, which doesn't meet the MB spec, but accomplishes the same goal. Conventional green antifreeze is loaded with silicates an other inorganic salts that will clog up the radiator tubes and shorten pump seal life due to the abrasive nature of the additives.

Conventional green antifreeze belongs in the list of obsolete service products along with alcohol based antifreeze and non-detergent oil.

Suggest you also find another shop or in the future specifiy or supply the maintenance products you want used. If they aren't smart enough to use readily available Zerex G-05 instead of the green stuff, I have to question their competence to service M-B automobiles.

Duke