I have been getting a coolant smell through the vents when the heater is turned on in my 98 ML320. I haven't had to add much water to the coolant system in the three and a half years we have had it, maybe a two or three pints total in the whole time. I'm assuming I'm starting to get a leak in the heater core. Has anybody here ever tackled the heater core? How hard is it to get to?

Never done the job, but the part is here http://www.trademotion.com/partlocator/index.cfm?action=getLocator&siteid=213951&chapter=EPI346&appSectionid=9&groupid=10027&subgroupid=60722&make=67&model=Ml320&year=1998&catalogid=1 for $132.75 + shipping.

Not too familiar with your model, but I have changed the cores on a W123 and a W126. But first I went to Pic N Pull to "practice". It was necessary to remove the console and the dash. For a shop to perform this, I think it is about 6 to 7 hours labor. It's intense for the do it yourselfer. But very gratifying when finished.

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Selling used Mercedes parts on Ebay...always changing...
cdplayer51 take a look!
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