Not sure if the 107 is anything like the 129 but my post #19 maybe of some assistance if it is?

http://www.peachparts.com/shopforum/showthread.php?t=137883&page=2&highlight=temperature

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'93 R129 500SL-32
'89 190E 2.6 - sold in 2002

http://antron.pwp.blueyonder.co.uk/i...nature/Sig.jpg