I replaced the OVP in my 1991 300CE last week after careful diagnosis from the info on the site.
There is no change to the symptoms. All of the evils that a bad OVP causes, hard starting, rough idle, having to give it the gas to keep from stalling after starting, SRS, dandruff, insomnia, pestulence...., do not go away.
Is it possible that I installed a flawed unit? Do these symptoms add up to another diagnosis? I thought the SRS light was a dead giveaway to the OVP.