E125 will be the steer tacho under the steering wheel.
The truck will throw a critical stop & lock the parking brake on when it sees a steering fault like this.
Order a replacement steer tacho, line the grub screw up with the flat on the tacho shaft & thread lock the small grub screw on the joint.
A steer tacho on this is simple plug & play replacement - just unplug battery while you work.
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