Date registered: Oct 2008
Vehicle: SLK 55 AMG, S500L, Porsche Cayenne
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A190E STARTING PROBLEM
Similar starting issue with my A190, which although I have not cured, I do seem to have localised the problem?!
Starting issues began last year, when the weather cooled, unlocked with the alarm key and got in the car one evening, tried to start and nothing happened?!? ALL electrics working, new battery recently!!, new key fob batteries etc, just nothing on final turn to crank starter. After about 15 mins and 20 attempts, starter suddenly roared into life and away I went, non the wiser!!
Gradually as winter came, starting issues started appearing sporadically (especially colder mornings etc.), eventually after many attempts / short while, starter comes alive on final turn.
Then I had a period of a week, when I could not start the car, so investigated possible solutions with Mercedes garages and other Merc specialists. Mercedes said, definately the starter!! and not much change from £1000 to replace due to engine having to be dropped to gain access!!! Crazy.
Later that week car started fine, obviously did NOT spend the huge sum proposed!!
Spring came, and as temperature increased, problem dissapeared altogether, HOWEVER, last few weeks as it has cooled, problem has come back on a few occassions.
THIS TIME, I had thought about it a bit, and tried locking and un-locking car with KEY ONLY (NO ALARM!!!), and hey presto, not had a single re-occurance of the issue. Starts first time - no problem each time.
I THEREFORE STRONGLY SUSPECT THE STARTING ISSUE IS NOT THE STARTER MOTOR ITSELF, BUT THE CONTROL ELECTRICS FROM THE ALARM SYSTEM THAT MAY WELL GOVERN SOME IMMOBILISER CIRCUIT ON THE START FUNCTION, AND THIS FUNCTION MAY WELL BE TEMPERATURE SENSITIVE (I.E. INCREASED RESISTANCE ON CONDUVTIVITY OF A WIRE OR CIRCUIT AS THE TEMPERATURE LOWERS?!?! JUST A GUESS).
Does anybody have any thoughts / experiance in this matter at all?
Would be interesting to hear any solutions that might be suggested, as I would like to have alarm system back, but I suspect replacing all of that might also be rather expensive?!