In-Cabin Sound Check and Jake Brake Observation

What happens here

The presenter drives the motorhome, closing the window to evaluate the in-cabin noise level. He confirms that the cabin remains quiet with the new exhaust, similar to before the modification. He engages the jake brake and notes that while audible inside, it is not excessively loud. He also observes an engine warning light illuminating when the jake brake is used, indicating a potential electrical issue, and asks viewers for troubleshooting advice, mentioning a D-Dec 3 engine.

Goal: Assess the new exhaust sound and jake brake performance from inside the motorhome