Car Judders and possible transmission/gear box issue.

[SyedjAli]

Hi, I bought my Mercedes c class, 1 year ago 2013 plate, AMG sport automatic. Was returned to me after having the bumper repaired. But now the car judders and when shifts gears shakes. I was going up a hill the other day and the car completely stopped working and had to roll it onto level road before started working again. I suspect that there may be a transmission issue. Surprised as only got 45000miles on the clock and mainly use it for school runs. Not sure how to go about resolving the issue, will hand it in for diagnostic at Mercedes garage, but was wandering what people thought?

 

[mattkh]

Why did the bumper need a repair??

 

[SyedjAli]

Driver crash in the back of my car while I was stationary. Clearly was paying attention.

 

[mattkh]

Thanks.
Being a petrol engine car, I would say it is an electrical issue, such as some earth wire being loose.