Indeed..by 207 you'll be in need of heads, hopefully not sooner..

To wait on this job is just asking for trouble.. 500 is a Whole lot nicer then 5000.. I've seen quite a few cars come in w/ cracked guides..some get lucky..others not so much

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
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Located in the Atlanta area
Specializing in all pre and post merger AMG's including Hammers and DOHC M117 engines.
Mercedes Repair Atlanta