The 2024 EQB is Mercedes' compact electric crossover built on a modified GLA/GLB platform. Being brand-new to market, most failures we're seeing are early-life manufacturing defects and software glitches rather than wear items, but the platform shares some suspension and HVAC quirks with its ICE siblings.
AC Evaporator Leaks and Expansion Valve Failures
Occasional · medium severitySymptoms: Weak or no cooling despite compressor running, Musty smell from vents, Visible refrigerant oil residue under dash, HVAC fault codes related to low refrigerant pressure
Fix: Dash removal required for evaporator access—8-12 hours labor. Often find the expansion valve (TXV) stuck or the evaporator core pinholed at brazed joints. Full evacuate/recharge adds another hour. This is a known weak point carried over from the GLB platform.
Estimated cost: $2,800-4,200
Front Subframe Bushing Degradation and Knocking
Common · medium severityTypical onset: 15,000-35,000 mi
Symptoms: Clunking over bumps from front end, Steering feels vague or wandering on highway, Visible cracking or tearing of subframe mount bushings, Alignment specs won't hold after adjustment
Fix: The added battery weight accelerates bushing wear. Subframe must be partially dropped to replace bushings—4-6 hours labor. Some techs are seeing premature failure of the rubber compound, possibly batch-related. Alignment mandatory after.
Estimated cost: $1,200-1,800
Dashboard Squeaks and Rattle Noises
Common · low severitySymptoms: Persistent squeaking from upper dash area in cold weather, Rattle behind center stack or passenger airbag area, Creaking when going over uneven surfaces, Noise worsens after first winter cycle
Fix: TSBs address clip redesigns and foam pad additions, but many require partial dash disassembly to isolate—3-5 hours labor. Not a safety issue but drives owners crazy. Mercedes has issued multiple revised clip kits.
Estimated cost: $400-900
12V Battery Drain and Auxiliary System Faults
Occasional · high severitySymptoms: Vehicle won't wake up after sitting 3-7 days, Warning: 'Auxiliary battery malfunction' on dash, Infotainment and MBUX system won't boot, Charging port won't unlock
Fix: The 12V AGM auxiliary battery is undersized and certain software versions allow parasitic drain from always-on modules. Battery replacement is 0.5 hours, but often requires software update to address root cause—total 1.5-2 hours. Mercedes has released OTA updates for some VINs.
Estimated cost: $400-700
Upper and Lower Ball Joint Wear (AWD Models)
Occasional · high severityTypical onset: 30,000-50,000 mi
Symptoms: Clunking when turning at low speed, Excessive play in front suspension during inspection, Uneven tire wear on inside edges, Steering wander or instability
Fix: Dual-motor AWD models see accelerated ball joint wear due to instant torque delivery and front-heavy weight bias. Both upper and lower joints often need replacement together—3-4 hours per side. Control arms sometimes sold as assemblies only.
Estimated cost: $1,400-2,200
Headliner Sagging and Detachment at Edges
Rare · low severitySymptoms: Fabric drooping near rear hatch or sunroof, Visible separation at A-pillar or C-pillar trim, Adhesive failure in high-heat climates
Fix: Manufacturing defect in adhesive application on certain production runs. Headliner removal and re-gluing takes 4-6 hours. Mercedes covers under warranty if caught early, but post-warranty requires full interior strip.
Estimated cost: $800-1,500
Too new to call reliably, but early adopters are seeing quality-control issues typical of first-year EVs; wait for 2025+ model years or buy CPO with warranty coverage intact.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.