they ussually give those type jobs to the low man on the pole at the dealer. you will now be upgraded to a better tech and let them fix the prior repair for nada. if they can't or won't, try a different dealer. just sounds like a possible loose ground. the warning lights came on or the dash/instument light came on? edit...dash lights you might be alt bait.

interior light shorts are the door switches ,shorts running up the a pillar and possible time delay relay.

door lock problems are tedious to diagnose, but there is a logical sequence.

power antenas sometimes just have a mind of their own.

you might have killed the battery if it has discharged completely numeruos times. electrolyt level okay?

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g-wagen