Oh- oil in coolant - not good. If you feel lucky, you could try "K&W Metallic Block Seal" before tearing the head off. If you do, follow the directions EXACTLY or it won't work properly. It's a pain to use, requires complete flush before using, and requires a 24-hour drying time with an empty system afterwards. It did cure one car of mine for a few years, and seems to have fixed the second one (for now). It's about $8/can at your local McParts. Don't use any other brand or type of sealer, just the K&W in the copper colored can. Afterwards you should de-oil the cooling system and refill with fresh MB coolant. But either way, don't let it go too long, it does need to be fixed!
