My spare parts specialist at the local stealership informs me that the OVP and FPR's were upgraded with redesigned electronic components many times during the period that these were produced as a new item.

The latest upgrade is the item you should be putting in.

I bought an OVP from a non OEM spare parts specialist. It had no markings on the outside and had been made in China. I like yourself ended up putting the original OVP back into the car until I ordered one from an OEM Benz part supplier. The cost difference was over $ 100.00.

I.M.H.O. The OVP and FPR are critical components for the KE system. When ordering parts from Fastlane specify the OEM component.