Try www.alldatadiy.com The offer subscriptions to the service manual online. It's something like $25/year. I have this as well as a copy of WIS and I find myself using the website more because it's more convenient for most things.

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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