Presuming it is engine oil and nobody has put any oil in the rad system by mistake, the most common reason for this is failure of the head gasket in the area of the oil passage through to the overhead gear. Is there any sign of water in the sump? It is usually a one way affair as oil pressure is higher than water pressure.
Welwyn Merx Limited is a family run business with genuine passion, dedication and 25 years of experience dealing with Mercedes-Benz and AMG passenger cars. Tel: 01707 395999www.welwynmerx.uk
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.