Here is the USA MB is recalling almost all of the V-6 powered cars for OVER-CHARGING problems from the voltage regulator. That could also be the problem that you are having!

ON any M112/113 engined cars I would have the crank sensor replaced after 4 years! THEY will leave you walking!

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MERCEDES Benz Master Guild Technician (6 TIMES)
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Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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