Hi all,
Warning Lights / Auxiliary Battery Problem
I recently had a number of spurious warning lights come on in my pre-facelift S.500 (then disappear) for no apparent reason. Rear interior lights wouldn't come on / stay on, remote boot lid not working (and worse, boot would not stay closed
), plus other issues.
As per the advice of BlackC55 : 'Warning lights. The first port of call', I decided to get my car seen by a specialist battery centre in Bournemouth. I've used them before and they're great for thoroughly checking / giving advice / guidance and don't just want to sell you a battery and get you out of the shop!
They were most impressed with the condition, voltage, output of what looks like an original MB start battery, but established that the voltage / output from the auxiliary battery (hidden behind a rear seat panel, accessed from the boot) was extremely low. They fitted a new one and all the above spurious / Intermittent faults no longer appear: fantastic!
However, since the above was cured with a new aux. battery, the following has appeared; not sure if there's a link or it's just a coincidence
Using Gear Gear Selector Creates a Parktronic Fault Warning
After driving the car for more than approx. 5 minutes, if the gear selector is used to put the car into Park, Neutral or Reverse, an alarm sounds, 4x red squares appear on dash with the message 'parktronic inoperative', the red warning lamp above the manual dash mounted parktronic button lights up and the front & rear warnings on the rear and front do not work.
Pressing the manual dash board button has no effect and it appears that the only way to clear the fault is to stop the engine and restart..... and everything's back to normal!
It's not the worst fault I've had but frustrating as whenever you want to park / manoeuvre, when you really need the parking sensors, you have to switch the engine off, then on to make them work.
As a foot note, the sensors work properly if I drive close to another car, fence, etc., the fault only appears if the gear selector is operated to reverse, park or neutral!
Help!
Warning Lights / Auxiliary Battery Problem
I recently had a number of spurious warning lights come on in my pre-facelift S.500 (then disappear) for no apparent reason. Rear interior lights wouldn't come on / stay on, remote boot lid not working (and worse, boot would not stay closed
), plus other issues.As per the advice of BlackC55 : 'Warning lights. The first port of call', I decided to get my car seen by a specialist battery centre in Bournemouth. I've used them before and they're great for thoroughly checking / giving advice / guidance and don't just want to sell you a battery and get you out of the shop!
They were most impressed with the condition, voltage, output of what looks like an original MB start battery, but established that the voltage / output from the auxiliary battery (hidden behind a rear seat panel, accessed from the boot) was extremely low. They fitted a new one and all the above spurious / Intermittent faults no longer appear: fantastic!
However, since the above was cured with a new aux. battery, the following has appeared; not sure if there's a link or it's just a coincidence
Using Gear Gear Selector Creates a Parktronic Fault Warning
After driving the car for more than approx. 5 minutes, if the gear selector is used to put the car into Park, Neutral or Reverse, an alarm sounds, 4x red squares appear on dash with the message 'parktronic inoperative', the red warning lamp above the manual dash mounted parktronic button lights up and the front & rear warnings on the rear and front do not work.
Pressing the manual dash board button has no effect and it appears that the only way to clear the fault is to stop the engine and restart..... and everything's back to normal!
It's not the worst fault I've had but frustrating as whenever you want to park / manoeuvre, when you really need the parking sensors, you have to switch the engine off, then on to make them work.
As a foot note, the sensors work properly if I drive close to another car, fence, etc., the fault only appears if the gear selector is operated to reverse, park or neutral!
Help!
