I've got a 2003 SL350. It runs beautifully, but periodically I get all my electrics pulsing. The seat belt tensioner clicks, the parking sensors come on, the speaker clicks & all lights pulse. Periodic & random warning lights (coolant, battery, screenwash) come on, then disappear. On checking, no fault! Also if I stop, lock, unlock & restart, all OK for a while. Very weird. Any ideas? Some problem with a regulator or control unit. Both batteries are fairly new.
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I would be looking for a corroded earth point first, armed with small to large
wire brushes,as these cars are known for Water ingress through seals.
wire brushes,as these cars are known for Water ingress through seals.
Ted
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Pulsing lights is usually a symptom of a faulty voltage regulator.
Could also be a voltage drop in either the supply cable or return (engine to body cable or body to battery cable).
Could also be a voltage drop in either the supply cable or return (engine to body cable or body to battery cable).
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