try to get the September 2005 issue of `Startuned- Information for the Independent Mercedes-Benz Professional` read page 14 `Will the Fuel Pump Make it out And Back`

Your nearest MB dealer may have an issue to give to you

or go to www.mbwholesaleparts.com and click on Startuned at the top, But the fuel pump article isn't online, but you may be able to order a subscription or copy.