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On the motor-unit you can remove the 'main power' connector first. This has the same effect as removing the battery

UPDATE : 1.0.3.0 : 0-10 miles / no Volspeed 3.0 / no errors 1.0.3.0 : 11-360 miles / Volspeed 3.0 / no errors / speed limit 19 Mph (32 km/h) 1.0.4.0 : 361-810 miles / Volspeed 3.0 / no errors / speed limit 19 Mph (32 km/h) 1.1.0.0 : 811-1060 miles / Volspeed 3.0 / no errors / speed limit 19...

1.0.3.0 : 0-10 miles / no Volspeed 3.0 / no errors 1.0.3.0 : 11-360 miles / Volspeed 3.0 / no errors 1.0.4.0 : 361-810 miles / Volspeed 3.0 / no errors 1.1.0.0 : 811-1060 miles / Volspeed 3.0 / no errors

I have done 2 updates (1.0.3 -> 1.0.4 -> 1.1.1) all in 'workshop mode'. No issues, no remarks, nothing on my diagnostic reports. In my opinion/experience it's safe. By removing the chip before the update you are for 100% sure Bosch will not detect it.

@about 100 miles on 1.1.0.0

My Cube Cross Hybrid is now 3 months equiped with the Volspeed 3.0 ; in total 845miles and have had not any error. I restricted the max speed to 21miles. I have used it with drive unit firmware 1.0.3 .0, 1.0.4.0 and now with 1.1.0.0

Not correct..... You can choose between 2 new firmware's (1.1.0.0) for your CX ; one with E-Mtb enabled (replaces Sport) and the other one with the 'regular' Eco/Tour/Sport/Turbo.

No, EMTB-modus has the "Increasing or decreasing assistance between Tour and Turbo style", not the sport-modus.

Nope.... There are more 1.1.0.0 update possibilities ; my local dealer asked specific which updated I wanted. So, I think you got the update for a 'non mtb' e-bike. Please ask for the 85nm updated with E-MTB modus. Please also ask for a diagnostic report so you can check other parameter like...

Updated to DU 1.1.0.0 (latest 85nm version) and so far no troubles (about 65km) of any kind with the VolSpeed V3. Restricted the speed to 35km/h. Love the new EMTB software handling ! ! !

Summer Update Bosch Performance Line CX (2020 / Gen4) : More torque More powerful than ever: Increased to 85 Nm, the torque has a noticeable effect on riding behaviour. It accelerates faster, particularly at low cadences, and makes uphill starts much easier. Looks like the 85 Nm torque will...