SL55/63/65/R230 AMG: NPB
https://www.youtube.com/watch?v=c0Izjq-IVVo
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The Best of Mercedes & AMG
https://www.youtube.com/watch?v=c0Izjq-IVVo
http://www.ebay.com/itm/THROTTLE-BOD...sories&vxp=mtr
another
http://www.ebay.com/itm/THROTTLE-BOD...sories&vxp=mtr
this is the company i purchased from
http://www.ebay.com/itm/Throttle-Val...sories&vxp=mtr
i did a search for the audi a8 throttle body. but, basically anything that had the 4.2 v8 is the correct one. i bumped a thread in the e55 section that had all the info you needed to do the wire swap about 1.5 weeks ago.
i can show you what i did for the egr. while the hoses are big coming from the egr off the valve covers, the inside hole is less than 1/16" dia. i just spliced in an air compressor air filter with 1/4" hose ends and routed back into an open port i had right after the tb. since i changed the flex hoses, i couldn't hook up the fresh air portion of the system either. i just purchased a 3/4" mini filter to hang off the stock tubing.
shardul has the weld on adapter plates. i was able to wrap up the entire project for around $225.



