Merceds Benz 300 CL
Normal drive is just around the neighborhood, no more than 5 miles round trip every day. The last two times I've taken it out on the road for a longer ride, after about 30 miles the car's electrical system shuts down, radio, lights, windows, the service engine soon light comes on and the car dies. If I let it sit for 20-30 minutes it will start again but won't go for more than about 5 miles before the same thing happens. I've had it at the dealership and they can't find a problem
MB's are fickle little beasts. They want to be driven a lot and often. Electrical problems sometimes are the result of not enough driving to get the batteries fully charged.
Seeing as the car's 25 year's old it could also be a really shitty earth wire too. There's one in the boot that gets particularly bad if the rubber seal around the bootlid is bad and letting water in.
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