I bought a used vehicle that won’t engage with the transmission at all and have a lot of communication codes

2015 MERCEDES BENZ CLA250
160,000 MILES • 2.0L • TURBO • AUTOMATIC
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BDAYZ
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  • 6 POSTS
VUTUMIL DIC
Communication With Control Unit "Transmission" Has A Malfunction.

U0101
Communication With Control Unit "Transmission" Has A Malfunction.
The Torque Calculation Of The Control Unit Has A Malfunction.
Pending Codes
These issues haven't been confirmed yet, and will clear on their own if they don't reoccur.
U0101 Communication With Control Unit "Transmission" Has A Malfunction.
P061B
The Torque Calculation Of The Control Unit Has A Malfunction.
reanent codes
These issues are confirmed but can't be cleared by erasing codes. They will clear on their own when the issue is repaired.
The Torque Calculation Of The Control Unit Has A Malfunction.
A Very Fine Leak In The Evaporative Emission Control System Was Detected.
The Valve For Crankcase Ventilation Has A Malfunction.
A Fine Leak In The Evaporative Emission Control System Was Detected.
A Gross Leak In The Evaporative Emission Control System Was Detected.
The Coolant Temperature Is Below The Coolant Thermostat Specified Temperature.

C05E100 (CURRENT | STORED)
No CAN Message Was Received From Control Unit 'A90 (COLLISION PREVENTION ASSIST Controller Unit)' Or 'A89 (Distronic Electric Controller

C037100
(CUKKENI OIUKEU)
No CAN Message was Recelvea rrom contror unit iransmission .
C06A100 (CURREN|SIORED)
No CAN Message Was Received From Control Unit 'Engine'.
C054100 (CURRENT | STORED)
No CAN Message Was Received From Control Unit".
C066300 (CURRENT | STORED)
One Or More Sianals Sent From Contro Unit Via The CAN Bus Is Imo ausible
C058500 (CUKRENI ISTUKED)
One Or More Signals Sent From Control Unit 'Engine' Via The CAN Bus Is Implausible.
May 1, 2026 at 10:17 PM
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STRAILER
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Hello, This is almost certainly not a normal internal transmission failure diagnosis yet. Make sure the battery is in good shape, if the voltage is low you will get these codes, also you should check all fuses with the system on, this guide and video will help.

https://www.2carpros.com/articles/how-to-check-a-car-fuse/

and

https://www.youtube.com/watch?v=G-xNK79Wa-w

Also, if a system ground is off it will cause this issue so please check around the engine and transmission to see if any are off. Please go over these guides and get back to us.
May 2, 2026 at 6:06 PM
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BDAYZ
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I’ve replaced auxiliary batteries as it was completely dead. Main battery measures 14.85v when vehicle is on.
May 2, 2026 at 7:57 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
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Yep that sound help do you still have the codes after you cleared them? This video should help

https://www.youtube.com/watch?v=ahK_eucFi-k

Please go over this guide and get back to us.
May 3, 2026 at 9:34 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.