rainer_schmitz5

Mercedes CLA Hybrid Automatic Gearbox Problems

My 2020 Mercedes CLA Hybrid is showing some strange automatic gearbox behavior. It shifts erratically, the transmission light is on, and it's gone into emergency mode. Could low voltage be the cause?

4 comment(s)

I drive a similar Mercedes CLA, but not a hybrid. I had similar transmission slipping issues a while back. The automatic gearbox acted erratically, especially when the hydraulic fluid got warm. Have you checked the transmission oil level? Low fluid could cause some of these problems.

Did your CLA exhibit the same emergency mode symptoms as well? Did the oil replacement resolve the issue completely, or were further interventions necessary?

Yes, it did go into a limp mode a couple of times, which I guess is the emergency mode you mentioned. After the oil replacement, the problems vanished. But honestly, with those symptoms and the mileage, I'd get it checked by a workshop as soon as possible. There could be more going on than just worn-out hydraulic fluid.

I took your advice and scheduled a workshop appointment. It turns out the automatic transmission oil was worn out and needed replacement. The total repair cost was 240€. Thanks again for your assistance.

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