E 63 AMG Sedan (211.077) V8-6.3L (156.983) (2007)
The O2 sensors downstream of TWC are insulated as voltage free and designed as a planar (flat) wideband oxygen sensors.
The active sensor ceramic consists of a gas permeable ceramic body made of zirconium dioxide. The inner protective tube with several slots protects the
ceramic body from mechanical stresses and from temperature jumps.