Sergio Martell
Sergio Martell at Dalton Hyundai of National City

Sergio Martell

General Sales Manager

Dalton Hyundai of National City

3150 National City Boulevard
National City, CA 91950

Contact Me
4.5
17 Reviews

Dealership Experience

1 yr, 10 mos

Industry Experience

18 yrs, 1 mo

Languages Spoken

Spanish Spanish

4.5

17 Reviews

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17 Reviews of Sergio Martell

June 04, 2026

Dealership Rating
Employee Rating

i've dealt with multiple dealers in AZ and let me tell you, first-time CA buyer and had a great experience, Chris my sales rep was top of the line, all questions answered. Mark the sales manager made sure More

by yonathan0
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Cedric Butler, Mark Moore

Jun 04, 2026

Dalton Hyundai of National City responded

We’re thrilled your first California purchase went so smoothly from getting every question answered to an easy process. Mark made your service visit exceptional and Sergio appreciated the chance to chat. Congratulations on your new Hyundai Sonata Hybrid and thanks for the 5 star rating.

June 02, 2026

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Employee Rating

Very kind, too much clean. Thank you for your support. I will visit next time. More

by Jiho park
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
Jun 02, 2026

Dalton Hyundai of National City responded

We’re glad our team’s kindness and a spotless environment made an impression. It’s great to know our support met your expectations. We look forward to your next visit to explore more Hyundai offerings.

May 21, 2026

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Employee Rating

Great dealer - knowledgeable and professional sales, management and finance staff! They delivered a great product in a comfortable environment. Highly recommend. More

by djbreithaupt
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes

Other Employees Tagged: Sale and finance persons

May 22, 2026

Dalton Hyundai of National City responded

We are very happy to have provided you with such a positive experience! We sincerely value your business and look forward to your next visit.

May 10, 2026

Dealership Rating
Employee Rating

The dealership itself is great, and they are all helpful. I was just frustrated when I make my appt for my ceramic coating costing $1500 (or something along those lines), and they deny me a ride home unless More

by Veaziejeff3
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
No
May 14, 2026

Dalton Hyundai of National City responded

Thank you for this feedback. We're very sorry to see that you didn't have the best experience at our dealership. While we're disappointed to learn that we didn't meet your expectations, we'd love to try to turn things around and make sure the same thing doesn't continue to happen.

May 02, 2026

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Employee Rating

They welcomed me, sent me things in the mail, and worked with me on financing. More

by susan.korosy
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
May 02, 2026

Dalton Hyundai of National City responded

Thanks for choosing a used Hyundai IONIQ 5 with us. We’re glad you felt welcomed, appreciated our mail updates, and found the financing process accommodating. We look forward to assisting you again soon.

April 29, 2026

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Employee Rating

They always do an excellent job, quickly and with great customer service. 100% recommended. Definitely coming back. More

by Galaz
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
Apr 29, 2026

Dalton Hyundai of National City responded

Thank you for recommending our team so highly. We’re pleased they completed the work promptly while delivering friendly and attentive service. We look forward to assisting you again soon.

April 24, 2026

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Employee Rating

Good customer service, did not try to over sell services, wait time was reasonable, lounge was comfortable More

by alsoto14
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes
Apr 24, 2026

Dalton Hyundai of National City responded

We’re pleased to hear our team delivered straightforward service and kept your wait time reasonable while you visited with your used Hyundai Elantra N. It’s great to know the lounge provided a comfortable space. Let us know if there’s anything else we can help you with.

Apr 27, 2026

Dalton Hyundai of National City responded

Thank you for sharing the exceptional service you received from our team during your visit, we look forward to seeing you during your next visit!

April 24, 2026

Dealership Rating
Employee Rating

Muy buen equipo de trabajo y muy buena atención con los clientes estoy muy satisfecho con mi compra reciente con Dalton Hyundai More

by carlosalbertomoralespadron5
Sales Price Transparency
Trade-in Experience
Purchase Time
Finance Experience
Recommend Dealer
Yes
Apr 24, 2026

Dalton Hyundai of National City responded

It’s wonderful to hear our team’s collaboration and attentive service impressed you. Congratulations on your new Hyundai Elantra. We appreciate your trust and look forward to serving you again.

Apr 27, 2026

Dalton Hyundai of National City responded

Gracias Carlos por compartir tu experiencia con nuestra equipo!

April 23, 2026

Dealership Rating
Employee Rating

Pulled a bait and switch, taking them to court Beware, they're bad, buyer beware More

by double77guy
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
No

Other Employees Tagged: Mark Moore

Apr 23, 2026

Dalton Hyundai of National City responded

We’re sorry to hear you feel this way. All pricing was clearly itemized and reviewed prior to completing your purchase. Nothing was added after the fact, and everything was agreed to in the signed documents. We take transparency seriously and are always available to review any part of the transaction with our customers. If you’d like to discuss this further, please feel free to contact me directly. Sergio

April 23, 2026

Dealership Rating
Employee Rating

This dealership was really good when I was buying my car and taking care of the maintenance. However, this last maintenance I had to pay for because I missed my three year warranty by twenty four hours.And More

by scmontgomery89
Sales Price Transparency
Purchase Time
Finance Experience
Recommend Dealer
Yes
Apr 25, 2026

Dalton Hyundai of National City responded

Thank you for taking the time to share your feedback. Please don't hesitate to reach out to us directly to discuss your concerns, we are always happy to help. Thank you for choosing Dalton Hyundai of National City!

1

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