Yip they are definately NOT the same And yes they are available on E-bay the problem with buying one of E-bay granted they are only £40-£50 and wait for it £250 ish from VW [still available too] its the weight issue it costs a fortune to get them sent so they have to be uplifted unless you are very lucky and find one with-in driving distance which i really doubt
However an engine tray is not really needed if you havent lowered your Transporter but a must when you have btw Autos to my knowledge are no different in this to a manual
Hope that helps a bit Phil
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