2021 — 2023
EQB 300 4MATIC (66.5 kWh) - Mid-range dual motor, AWD
Electric
Listen closely for any suspension 'clunks' at low speeds, as the EQB is a heavy vehicle and the air-sprung components or bushings can experience premature wear on rougher NZ backroads.
Operate the MBUX infotainment screen and climate settings repeatedly; ensure the haptic feedback and responsiveness remain smooth, as electronic glitches in the central processor can sometimes surface.
Check this by cycling through the drive modes; verify the transition between regenerative braking levels feels consistent, as intermittent software hesitation can occasionally occur in early-production models.
Examine the seals around the panoramic sunroof and door frames; while rare, ensure there are no signs of moisture ingress, as rubber seals can sometimes lose their suppleness over time.
Consider a proactive cabin air filter replacement and a comprehensive check of the 12V auxiliary battery health.
This is a prudent time to have the high-voltage cooling system inspected for any potential coolant residue or connection integrity.
The brake fluid should have been flushed twice by this point; confirm the brake pad wear sensors are functioning correctly as the regenerative braking often masks pad longevity.
Ensure the charge port door mechanism operates smoothly and remains flush with the bodywork.
Verify that the Mercedes-Me app connectivity is transferred to your name and is syncing vehicle data correctly.
Perform a quick inspection of the underbody plastic shielding to ensure all clips are secure after driving on unsealed roads.
Check the tyre pressure monitoring system (TPMS) accuracy, as the EQB is sensitive to the specific rolling resistance tyres fitted.
Regularly clean the front grille-mounted sensors to ensure the Driver Assistance systems remain accurate in our varying NZ weather.
Estimated repair costs if issues arise
In EVs, the 12V system powers the electronics and starts the HV contactors. If this starts to show voltage drops, it is best to replace it before it causes random dashboard warning lights. Future Budget Planning: It is wise to set aside funds for a quality AGM battery replacement.
Given the weight of the EQB, the front suspension components work harder than in a traditional ICE vehicle. Depending on the local road quality, you might eventually need to budget for refreshing the front control arm bushings.
The MBUX system is sophisticated. While reliable, if the central control unit requires software reflashing or a hardware module replacement outside of the factory warranty period, it is worth keeping a small buffer for specialist diagnostics.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer