The simple answer is - when it goes bad.
On 12/08/2021 8:39 PM, Allan Streib via Mercedes wrote:
Since when is a head gasket "recommended maintenance" on a car with only 86k miles? https://chicago.craigslist.org/nwi/cto/d/valparaiso-1991-mercedes-benz-e-23l/7364902160.html Allan _______________________________________
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