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CONNECTICUT · MAIL-IN SERVICE

Mercedes W164/X164/W251 EIS Repair in Connecticut

Ship your module from Hartford or anywhere in Connecticut — we complete the work in 24 hours and ship it back at the return speed you choose at checkout — standard to overnight.

$399 flat 24-Hour Turnaround ~3 day USPS from CT
Text Before You Buy

Why Connecticut customers mail in mercedes w164/x164/w251 eis repair

Connecticut has roughly 2.9 million registered vehicles, and European luxury (BMW, Mercedes, Audi) make up much of what Hartford-area shops and owners mail us. European platforms cluster in Hartford, Bridgeport, New Haven, and most local Hartford shops sub bench jobs like mercedes w164/x164/w251 eis repair to a specialist instead of tooling up for one car. Cross-country northeast — about 3 days each way.

Metros we serve in Connecticut

HartfordBridgeportNew HavenStamford

Connecticut at a glance

  • ~2.9M registered vehicles statewide
  • Most common: European luxury (BMW, Mercedes, Audi)
  • Connecticut requires a biennial OBD-II emissions inspection for most vehicles statewide.

What you get

  • Component-level repair of the failed EIS (no donor required)
  • Original VIN binding + key pairing preserved
  • Full bench-test with your supplied working key
  • No additional ECU or ESL re-programming needed after install
  • 24-hour bench turnaround
  • Return shipping your choice at checkout — standard, 2-day, or overnight
  • Photo of completed bench-test before shipping back

Shipping timeline — Connecticut ↔ Arlington TX

USPS Priority routes northeast through the regional network; typically 3 days to the Northeast. Typical round-trip from Hartford or anywhere in Connecticut:

  1. Day 0

    You ship

    USPS Priority from CT, ~$13

  2. Day 3

    We receive

    Workshop opens + inspects

  3. Day 4

    Work done

    24-hour bench turnaround

  4. ~Day 7

    Back to you

    Return speed you chose at checkout

Connecticut FAQ

Common questions from customers shipping from Connecticut.

How long does shipping take from Connecticut to your Arlington TX workshop?
USPS Priority Mail from Hartford, CT reaches our Arlington workshop in about 3 business days. USPS Priority routes northeast through the regional network; typically 3 days to the Northeast. We start work the same day your module arrives and ship back next business day at the return speed you chose at checkout.
How much does it cost to ship a module from Connecticut?
USPS Priority flat-rate from Connecticut to Arlington TX runs about $13. The customer pays shipping to us; return shipping back to Connecticut is selected at checkout — $14.95 standard (3-5 business days), $29.95 UPS 2-Day, or $74.95 UPS Next Day Air, flat nationwide. Cross-country northeast — about 3 days each way.
Do you accept mercedes w164/x164/w251 eis repair modules from Connecticut?
Yes — we receive modules from Hartford, Bridgeport, New Haven, Stamford and the rest of Connecticut regularly. With about 2.9 million registered vehicles statewide, European luxury (BMW, Mercedes, Audi) are the bulk of what we see from Connecticut.
Is there a mercedes w164/x164/w251 eis repair shop in Hartford I should use instead?
Most Hartford shops don't keep the bench equipment for mercedes w164/x164/w251 eis repair — they'd forward the module to a specialist anyway, which adds a markup and a middleman. Going direct to us is usually faster and cheaper. Cross-country northeast — about 3 days each way.
Does Connecticut vehicle inspection or emissions testing affect this service?
Connecticut requires a biennial OBD-II emissions inspection for most vehicles statewide. Our service is bench module programming only — you remain responsible for your vehicle's compliance with all Connecticut and federal requirements.
What if no keys work at all?
You need the Key Replacement via EIS service instead ($150). We program a fresh key directly to the EIS in that case.
Will I need to re-pair the ECU or ESL after install?
No. The repair preserves all immobilizer linkages (EIS ↔ ECU ↔ ESL). Reinstall, insert your existing key, start the car.

Full details

See the complete Mercedes W164/X164/W251 EIS Repair service page

Compatibility list, what it fixes / doesn't fix, shipping instructions, warranty.

Full Service Page

Same service from other states:

AlabamaAlaskaArizonaArkansasCaliforniaColoradoDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusetts

Ship from Connecticut today

Pay now, get the Arlington TX shipping address by email, drop it in the mail. Full round-trip from Hartford: about a week.

(817) 678-3252