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Mercedes EQ Diagnostic & High-Voltage Service in Dubai

Battery, inverter/charger, HV isolation & cooling — expert ECU diagnosis with Xentry. WhatsApp us and we’ll start today.

خدمة تشخيص مرسيدس EQ عالية الجهد في دبي — بطارية، إنفرتر/شاحن، عزل كهربائي وتبريد مع خبرة Xentry. تواصل واتساب الآن.

HV-Safe Workflow Same-day Visit ECU & BMS Expertise Dubai On-site
Top EQ Problems Diagnostic Flow What We Fix Why MBCOD Service Areas FAQ

Top EQ Problems We Solve (Not Charging, Safe Mode, Isolation & More)

“EQ in safe mode / Drive system — visit workshop” after short stop, jump-start or 12V swap.
Won’t charge (AC/DC) — wallbox handshake, pilot/PP signals, bent/dirty pins.
Isolation fault / HV interlock warnings after rain, wash, or collision.
Fast SOC drop and uneven cell voltage (BMS imbalance).
Battery/inverter over-temperature — pump/valve issues, coolant bleed needed.
Gateway resets after load spikes — DC/DC or 12V rail instability.
Charging port errors — actuator/lock faults, water ingress in socket.
e-Motor noise / vibration under acceleration (resolver/encoder, bearings).
After module replacement — needs Xentry SCN coding & initialisations.
HV contactors / pre-charge errors after long parking or deep discharge.
12V replaced → many faults (ABS, airbags, ESP, BMS cascade).
Cooling leaks near battery/inverter plate heat-exchanger.

مشاكل EQ الشائعة في دبي: وضع الأمان، عدم الشحن، فشل العزل العالي الجهد، حرارة البطارية/الإنفرتر، وأخطاء بعد تغيير بطارية 12V.

EQ Diagnostic Flow — Clean, Safe, Precise

  1. Xentry full scan (BMS/EMD/OBC/DC-DC/HPC) + freeze-frames, VIN & software checks.
  2. HV isolation test & interlock continuity, then cooling bleed and pump/valve actuation.
  3. Charge path verification: EVSE, pilot/PP, OBC relays, DC fast pins & contactors.
  4. Live data review: cell delta, temperature spread, inverter currents, derate flags.
  5. Firmware/SCN validation; perform online coding & final road test.
Pro tip: Keep a smart charger on the 12V battery during diagnostics to prevent gateway restarts and false cascades.

What We Fix on Mercedes EQ (Battery, BMS, Inverter, OBC & More)

High-voltage battery & BMS — balancing, contactors, venting, harness & sensors.
Inverter / e-motor control — phase current faults, resolver/encoder, derate.
On-board charger (OBC) — handshake, relays, socket lock, moisture checks.
DC/DC converter — unstable 12V rail, low-voltage dropouts, gateway resets.
Cooling system — pumps, valves, plate HX, vacuum bleed & leak test.
Safety — interlock loops, insulation monitoring device (IMD).

Why MBCOD for EQ in Dubai

Xentry-level diagnostics & online coding for BMS/INV/OBC updates.
Mercedes-only focus — ECU & electrical specialist for 2010-2026 models.
Same-day mobile visit across Dubai; workshop options for complex repairs.
Clear WhatsApp workflow — quick triage, photos, VIN last-6, transparent plan.

Ready? Message us with model/year, area and the warning message. We’ll reply in minutes.

Call MBCOD

We Cover All Dubai Key Areas

Dubai Marina, JBR / Bluewaters, Palm Jumeirah, JLT, Dubai Hills, Business Bay, Downtown / DIFC, Jumeirah / Umm Suqeim, Al Barsha, Al Quoz, Motor City / Sports City, Mirdif / Al Warqa, Deira / Al Rigga, Bur Dubai / Karama, Nad Al Sheba, JVC / JVT, Discovery Gardens / Al Furjan, DIP / JAFZA — plus Sharjah & Ajman by request.

EQ FAQ — Fast Answers

Is it safe to drive with “EQ in safe mode”? If power is limited, avoid highways and book diagnostics. Safe mode often relates to cooling, isolation or sensor issues.
Car won’t charge at home but works at public DC? Likely AC/OBC handshake or pilot line issue. We test EVSE, OBC relays, socket lock and moisture in the charge port.
After 12V battery change I got many errors — normal? EQ is sensitive to voltage dips. We stabilise 12V, re-initialise BMS/OBC and clear cascaded faults.
Water under the car — coolant or A/C? Could be A/C condensation, but EQ has dedicated cooling circuits. We pressure-test and bleed to protect electronics.
Do you handle software updates & SCN coding? Yes. We perform Xentry online coding/updates and required initialisations after module repairs or replacements.

Need fast help? Send model/year, your area and a photo of the warning. We’ll reply in minutes.

Call MBCOD

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