Tino, I finally got some time to look at this again. The voltage is coming to the 2 pronged connector to the motor. +12v on one prong with the switch in open position and +12v on the other prong when the switch is in the close position. So the voltage is getting to the trunk correctly. Now where was that relay? I felt around for another box/junction/MBBlack box from the connector to the motor and didnt find anything there... The MB manual didnt show much either... Just the Switch and 2 wires going to the motor... Maybe yours was a differnet model???

Thanks

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1985 300D
The rest:
1957 MGA (comatose)
1965 Falcon (sleeping)
1966 E-100 (rust test in progress)
1976 Ford 3400 D Tractor (workhorse)
1978 Mercury Zephyer (5L playtoy)
1995 Isuzu NPR D (fetcher)
1998 Subaru Legacy (Spare)
2000 Toyota Sienna (School bus)
2008 Toyota Prius (Commuter)