Originally Posted by joshi899

Yes, the 1999 Mercedes-Benz E320 can have biodegradable wiring insulation, but it depends on the exact production period and whether it has already been repaired or updated. Mercedes used biodegradable (eco-friendly) wiring insulation mainly in the early-to-mid 1990s, especially in models built roughly between 1992 and 1996. By 1999, most of those issues had been resolved at the factory, so the majority of E320s from that year did not suffer from the same widespread wiring harness deterioration seen in earlier cars like the W124 and early W210 models.