chrisCLKfrance
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I own a pre owned 1999 CLK 320 Cabrio Auto with a full mercedes service history.
The problem is that when coming to a standstill in Drive, the engine stalls. On restarting the engine, it take several attempts to engage Drive once again without the engine stalling. The result is the same for Reverse also. The action required to do this is fairly brutle and requires a few revs before very quicky droping the stick into Drive and simultaneously reapplying the right foot.
The stalling action feels consistent with stopping a manual car without using the clutch.
Once the car is moving at a constant speed normal service resumes with smooth change up and change down thought the Auto box occuring.
The problem first occured when the engine was a normal operating temperature. It is possible to drive the car from cold for a few minutes before the problem reoccures. Giving the engine a 30 second rest does appear to improve the chance of the problem temporarily dissapearing but to no conclusive extent.
Driving the car in first with no foot on the accelerator, a mechanical sort of rattling noise can be heard coming from the direction of the gearbox (it becomes more noticable when opening the doors) This stops when engaging Neutral.
Changing the Summer and Winter setting make no impact on the results
As soon as this happened, I took the car to the local merc dealership and booked it in for a service as it was only a few hundred miles off before one was due. I explained the problem. The diagnosis was to replace a small electical switch. Needless to say the car stalled within the first few minutes of the keys being returned to me. The response was "it is a cold morning the car is probably just cold" it took quite sometime to convince them that they had incorrectly misdiagnosed the problem. I demonstrated the problem to a senior mechanic and they agreed to have another look.
The second diagnosis they have now given was that there is 'a problem' with the torque convertor and the hydrolic swithing gear. The solution is to replace the entire auto gear box with a new one. The reason given for this approach is that the garage refuses to expose itself to guaranteeing work on a gearbox that has done 70K miles. I can't bring mysefl to say how much they are quoting for this work
Anyone any Ideas what the possible cause for this problem could be?
The problem is that when coming to a standstill in Drive, the engine stalls. On restarting the engine, it take several attempts to engage Drive once again without the engine stalling. The result is the same for Reverse also. The action required to do this is fairly brutle and requires a few revs before very quicky droping the stick into Drive and simultaneously reapplying the right foot.
The stalling action feels consistent with stopping a manual car without using the clutch.
Once the car is moving at a constant speed normal service resumes with smooth change up and change down thought the Auto box occuring.
The problem first occured when the engine was a normal operating temperature. It is possible to drive the car from cold for a few minutes before the problem reoccures. Giving the engine a 30 second rest does appear to improve the chance of the problem temporarily dissapearing but to no conclusive extent.
Driving the car in first with no foot on the accelerator, a mechanical sort of rattling noise can be heard coming from the direction of the gearbox (it becomes more noticable when opening the doors) This stops when engaging Neutral.
Changing the Summer and Winter setting make no impact on the results
As soon as this happened, I took the car to the local merc dealership and booked it in for a service as it was only a few hundred miles off before one was due. I explained the problem. The diagnosis was to replace a small electical switch. Needless to say the car stalled within the first few minutes of the keys being returned to me. The response was "it is a cold morning the car is probably just cold" it took quite sometime to convince them that they had incorrectly misdiagnosed the problem. I demonstrated the problem to a senior mechanic and they agreed to have another look.
The second diagnosis they have now given was that there is 'a problem' with the torque convertor and the hydrolic swithing gear. The solution is to replace the entire auto gear box with a new one. The reason given for this approach is that the garage refuses to expose itself to guaranteeing work on a gearbox that has done 70K miles. I can't bring mysefl to say how much they are quoting for this work
Anyone any Ideas what the possible cause for this problem could be?
