Weird start behaviour - Tipstart not working
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 21
Likes: 6
From: Spain
CLK 500 W209, S320 CDI W220
Weird start behaviour - Tipstart not working
Hi all, hope this post finds you well,
Since I've had this car there's been a strange problem with the start process that's been impossible to diagnose - MY 2000 S320 CDI
When I go to start the car, I have to hold the key in position 3 in the EZS until the engine has started. If I let go of the key to position 2 before the engine has started, it stops cranking immediately, and I have to take the key out and put it back in and start all over again.
Same thing happens when starting the car via the keyless go button on the shifter knob. If I let go off the button too early, the cranking stops before the engine has started.
Normally in any other Mercedes you just flick the key briefly to position 3 and it will start cranking automatically until it detects the engine has started. This is what is not working on my car.
The car shows no fault codes on Star Diagnosis. The EZS was replaced a few months ago because the original one had failed, but that did not fix this problem either.
What could be the problem? I'm out of ideas and would like to get this 'Tip Start' function working again, some day
Since I've had this car there's been a strange problem with the start process that's been impossible to diagnose - MY 2000 S320 CDI
When I go to start the car, I have to hold the key in position 3 in the EZS until the engine has started. If I let go of the key to position 2 before the engine has started, it stops cranking immediately, and I have to take the key out and put it back in and start all over again.
Same thing happens when starting the car via the keyless go button on the shifter knob. If I let go off the button too early, the cranking stops before the engine has started.
Normally in any other Mercedes you just flick the key briefly to position 3 and it will start cranking automatically until it detects the engine has started. This is what is not working on my car.
The car shows no fault codes on Star Diagnosis. The EZS was replaced a few months ago because the original one had failed, but that did not fix this problem either.
What could be the problem? I'm out of ideas and would like to get this 'Tip Start' function working again, some day
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 21
Likes: 6
From: Spain
CLK 500 W209, S320 CDI W220
Just found this - maybe it could be on to something?
Attached the document below
If you receive customer reports in the above model vehicles of the tip start cycle ending prior to the engine starting, this may be due to the tachometer
momentarily jumping above 2000 rpm causing the starting procedure to be aborted before the engine starts.
To resolve, perform the below steps.
1.Remove starter per WIS instructions below.
2.Lightly coat teeth of starter ring gear with paste, A000 989 76 51
momentarily jumping above 2000 rpm causing the starting procedure to be aborted before the engine starts.
To resolve, perform the below steps.
1.Remove starter per WIS instructions below.
2.Lightly coat teeth of starter ring gear with paste, A000 989 76 51
