My 1995 S420 W140 has been missing then stopping after 20 mins driving while slowing up or in traffic it then refuses to start for about 45 mins-60mins.
Reading past problems I have changed ignition distributor caps and rotor arms
up to now ok but past posts read say maybe a fuel pump relay problem or
overvoltage protection relay.
Please could anybody suggest a cause or the location of both the fuel pump
relay and if fitted over voltage relay.

Regards John T