The first thing to do, especially if you're not familiar with Mercedes, is get access to the service manual. You can do this in several ways. You can subscribe to it online for something like $15/year at alldatidiy.com. You can also buy copies of the Workshop Information System (WIS) on ebay pretty cheap. Lastly, you can access the Mercedes Electroinc Parts Catalog (EPC) online for free. Check out www.StarTekInfo.com/epc

Second, you've come to the right place. There are a lot of really experienced Mercedes Techs that hang out here. The trick is to give people enough time to respond. Some only log on every few days, so give it some time.

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"It's not about how fast you can go, but how well you can go fast."

Bob in Richmond

'97 S320 (LWB), Ruby Red Metallic, 73k miles
'97 S420V, Smoke Silver Metallic, 155k miles