Date registered: Apr 2006
Vehicle: '98 E300, '03 3.2TL-S 'A-Spec', '92 S500 (sold), '87 190D 2.5 Turbo (RIP)
Location: Vancouver, Canada
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If you check the rear window element with an ohmmeter and find that there is an open circuit, find the break and bridge it with some of the 'paint' in any standard rear defroster repair kit. You may get lucky and repair the problem this way if there is a break in the element and you find it. The ohmmeter is a great tool for this, or at least for ruling the window element out of the 'defective part' list.