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Reviewed by Ajust Content Team
Last updated
April 17, 2026
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How to submit a complaint with
Mercedes-Benz
 

If something has gone wrong with your vehicle, service, or finance arrangement, Mercedes-Benz Australia gives you several reliable channels to raise it. Start with your retailer for the fastest fix, then escalate to head office if needed.

Step 1 — Speak to Your Mercedes-Benz Retailer First

  • Most issues (servicing, warranty, deliveries, sales, or quality) should begin with the authorised dealership where you bought or serviced the vehicle.
  • Ask for the Service Manager, Sales Manager, or Dealer Principal by name.
  • Describe the issue clearly and state the outcome you want — repair, refund, replacement, or compensation.

Step 2 — Escalate to the Mercedes-Benz Customer Assistance Centre

If the dealership can't resolve it, go directly to the Mercedes-Benz Customer Assistance Centre:

  • Phone: 1300 762 718 (Mon–Fri, business hours AEST)
  • Online contact form: Mercedes-Benz contact form
  • Support hub: Mercedes-Benz support & contact
  • Email (financial services): complaints@mercedes-benz.com
  • Mail (passenger cars): Customer Assistance Centre, 44 Lexia Place, Mulgrave VIC 3170
  • Mail (financial services): Private Bag 12, Mount Waverley VIC 3149

Step 3 — Use Mercedes me Connect for Digital Service Issues

Tips to Submit a Strong Complaint

  • Include your VIN, registration, and dealership name in every message.
  • Attach invoices, service reports, warranty documents, and photos.
  • Specify the outcome you want — repair, refund, replacement, or compensation.
  • Request a reference number and written confirmation.

What happens after you submit a complaint to Mercedes-Benz?

Mercedes-Benz Australia follows a structured internal process designed to keep customers informed. The Mercedes-Benz dispute resolution pathway moves through five clear stages, with finance complaints bound by stricter ASIC timeframes.

  • Acknowledgement — Your complaint is logged by the Customer Assistance Centre within a few business days, with a reference number for tracking.
  • Initial investigation (within 5 business days) — A CAC representative reviews the matter and liaises with the relevant dealer or internal team. Simple issues are often resolved here.
  • Internal Dispute Resolution (IDR) escalation — Unresolved cases are passed to the IDR team, where a dedicated case manager takes ownership.
  • Final response — Mercedes-Benz Financial Services complaints receive a substantive outcome within 21 calendar days, in line with ASIC's Regulatory Guide RG 271. Passenger car matters aim for a reasonable timeframe.
  • Written outcome letter — You'll receive the decision in writing, including next steps and external escalation rights if you remain dissatisfied.

Mercedes-Benz states it strives to treat customers with "professionalism, dignity, and respect" but maintains a zero-tolerance policy on aggressive conduct toward staff.

Common complaints against
Mercedes-Benz

Recurring themes from ProductReview.com.au (2.1/5 stars from 319+ reviews of Mercedes-Benz dealers), Trustpilot, and Whirlpool Forums include:

Extended Vehicle Downtime and Parts Delays

  • Vehicles off the road for weeks or months awaiting parts.
  • Limited proactive updates from the dealer or escalation team.
  • Goodwill loan vehicles often refused despite extended waits.

Unresolved Mechanical and Warranty Issues

  • Multiple dealer visits for the same fault — oil leaks, transmission problems, dashboard warnings, engine misfires.
  • Repairs returned without a permanent fix, prompting a Mercedes-Benz Australia warranty complaint under Australian Consumer Law.

Poor Communication from the Mercedes-Benz Escalation Team

  • Customers report being referred back to the dealership after weeks of waiting.
  • Difficulty reaching the Melbourne head office directly.
  • Inconsistent updates on case status.

Certified Pre-Owned ("CERTIFY") Concerns

  • Buyers reporting faults on vehicles supposed to have passed the 100-point checklist.
  • Disputes over warranty coverage on used stock.

High Servicing and Labour Costs

  • Dealer labour rates around $250/hr.
  • Capped-price servicing exclusions catching customers off guard.

Sales Practices

  • Misleading claims about vehicle features or specifications.
  • Pressure tactics on demonstrator stock.
  • Invoicing and delivery delays after sale.

Warranty and Goodwill Refusals

  • Goodwill repair or compensation requests declined despite extended downtime.
  • Pushback on Australian Consumer Law major-failure claims.

Takata Airbag Recall Communications (Historical)

Mercedes-Benz
 complaints submitted through Ajust

How other consumers
Mercedes-Benz
 complaints got resolved

114 Days Off the Road Waiting for Parts

A customer's Mercedes was off the road for 114 days awaiting parts. Goodwill assistance and a loan vehicle were initially refused. After a written escalation to the Customer Assistance Centre, a case manager was assigned and a partial goodwill contribution toward servicing was offered.

Tip: Keep a dated log of every call and email, and reference Australian Consumer Law guarantees on acceptable quality.

AMG C43 Transmission Failure at 2,600km

A 2023 AMG C43 owner reported a catastrophic transmission control failure at just 2,600km. Initial dealer repair attempts failed. A written "major failure" claim citing ACL triggered a formal IDR review instead of another repair attempt.

Tip: Use the words "major failure" in writing to escalate beyond the repair-only loop.

$700 Service Overcharge on a Van Under Warranty

A customer was charged over $700 for a full service on an 8-month-old van that wasn't due for a full service until 12 months. Both the dealer and Mercedes-Benz initially refused a refund. A written complaint to the CAC at 44 Lexia Place — with the original service schedule attached and a flagged escalation to Consumer Affairs Victoria — secured a partial credit.

Tip: Naming the state regulator you'll escalate to often unlocks movement.

How to escalate a complaint with Mercedes-Benz

If the first response doesn't deliver a fair outcome, here's how to step it up.

Dealer Principal or General Manager

  • Ask in writing for the Dealer Principal at your retailer to review the matter personally.
  • Set a clear deadline (5–10 business days) for a written response.

Mercedes-Benz Customer Assistance Centre

  • Call 1300 762 718 or use the online form to open a CAC case.
  • Quote your VIN, dealership name, and reference number from the dealer.

Internal Dispute Resolution (IDR) Team

  • If unresolved within 5 business days, request escalation to the IDR team.
  • Ask for a dedicated case manager by name.

Mercedes-Benz Financial Services Dispute Resolution Specialist

  • For finance, lease, or insurance: email complaints@mercedes-benz.com.
  • Or post to Private Bag 12, Mount Waverley VIC 3149.

Formal Written Complaint to Head Office

  • Post to Mercedes-Benz Australia/Pacific, 44 Lexia Place, Mulgrave VIC 3170.
  • Mark the envelope: "Attention: Customer Assistance Centre — Formal Complaint."

Request a Final Response Letter

  • Always request a written "final response" before approaching an external body — most ombudsman and tribunal services require it as proof internal remedies are exhausted.

Regulatory & Ombudsman Information for Mercedes-Benz

When internal steps haven't worked, these independent bodies can take it further — usually free of charge.

Official Mercedes-Benz Complaint Resources & Links

Mercedes-Benz
Complaints FAQs

How long does Mercedes-Benz Australia take to respond to a complaint?

Mercedes-Benz Australia aims to acknowledge complaints within a few business days and provide an initial response within 5 business days through its Customer Assistance Centre. Mercedes-Benz Financial Services complaints must receive a substantive final response within 21 calendar days under ASIC Regulatory Guide RG 271. Passenger car matters target a reasonable timeframe but have no fixed deadline, so request written confirmation of expected dates.

What evidence should I attach to a Mercedes-Benz complaint to strengthen my case?

Strengthen a Mercedes-Benz complaint by attaching your VIN, registration, dealership name, dated invoices, service reports, warranty documents, and photos of any defects. Add a written timeline of every call, email, and visit, and reference Australian Consumer Law guarantees of acceptable quality. Always state your desired outcome — repair, refund, replacement, or compensation — and request a reference number for tracking.

Can I take a Mercedes-Benz dispute to AFCA or a state tribunal?

Yes — Mercedes-Benz Financial Services disputes (loans, leases, insurance) can be lodged free with the Australian Financial Complaints Authority on 1800 931 678 once you have a final response. Vehicle, sales, or repair disputes can go to your state consumer regulator (such as Consumer Affairs Victoria or NSW Fair Trading) or tribunals like VCAT, NCAT, or QCAT for binding orders.

What should I do if Mercedes-Benz refuses goodwill or a major-failure refund?

If Mercedes-Benz refuses goodwill or a major-failure refund, send a written complaint to the Customer Assistance Centre at 44 Lexia Place, Mulgrave VIC 3170, citing Australian Consumer Law and using the term "major failure". Request escalation to a named IDR case manager and ask for a final response letter. If still unresolved, lodge with your state tribunal or the ACCC.

You’ve done your part, now it’s time to hold
Mercedes-Benz
accountable.

Take the final step and submit a complaint that gets seen and responded to.