I have 96 SL2 with a standard transmission. On Monday and Tuesday, the
car would not start. I turned the ignition, heard a low buzz and
nothing happened. Not even clicking sound from the starter, let alone
the engine cranking.

The battery power works fine; I could turn on the lights and listen to
the radio. Connectors on the battery are in good shape.

The tow truck driver was able to get the car to do a rolling start. I
had it the dealer for two days and the car continuously started. From
what they could tell, the start, alternator and battery all work fine.
They gave me the car back today, completely puzzled and unsure what to
do.

I've had two previous starting problems over the past few months. Both
times, the engine would turn over. These occurred when I started the
car, drove it to a store. Went in, restarted the car, drove it to
another nearby store. Went, tried to restart the car and nothing
happened. In both previous instances, the car started after about
10-15 minutes.

Any ideas as to what could be happening?