
Mercedes-Benz key replacement in Portsmouth
Mercedes keys use some of the more advanced security around. We handle many models on site, and we'll tell you honestly up front if a particular car needs a different approach.
How much does a replacement Mercedes-Benz key cost in Portsmouth?
A Mercedes-Benz spare key usually costs £150–£290 when you still have a working key, and replacing a lost Mercedes-Benz key typically costs £200–£450 when every key is gone. The price depends on the key type and immobiliser system. We cut and program Mercedes-Benz keys at your car across Portsmouth & the PO postcode area and confirm a fixed price from your registration first.
Last updated
| Spare key | £150–£290 (average) |
|---|---|
| All keys lost | £200–£450 (average) |
| Response time | around 1 hour |
| Warranty | 12 months on parts and labour |
Mercedes-Benz key security explained
Smart keys
The chrome-style keys with a pop-out emergency blade, linked to the car's security system.
KEYLESS-GO
Keyless entry and start on many models.
Security generations
Mercedes uses different security systems depending on age. Some newer systems are more limited – we'll confirm what's possible before you book.
Mercedes models we work on
- A-Class
- Popular hatchback.
- C-Class
- Saloon and estate with smart keys.
- E-Class
- Executive cars, often KEYLESS-GO.
- Sprinter
- Work vans – fast turnaround matters.
- Vito
- Mid-size van keys.
Other Mercedes-Benz models are covered too – call with your registration.
Recent Mercedes-Benz jobs

Ford Transit Custom
New flip key cut and programmed on the driveway – van back at work the same morning.
Read the job
Volkswagen Golf
Worn ignition barrel sorted on site – key turns smoothly again, no tow to a garage.
Read the job
BMW M4
New smart key coded to the car's security module on site, avoiding a dealer wait.
Read the jobCommon Mercedes key problems
- Key not starting the car
- Emergency blade lost
- Sprinter or Vito keys lost on a job
- Spare keys for used cars
What we offer for Mercedes-Benz
Mercedes-Benz key FAQs
Beyond Mercedes-Benz: more ways we can help
Check your Mercedes and get a quote
Tell us the registration and where the car is – we'll confirm the price before we start.
Portsmouth Car Keys
023 9299 0167Mon–Sun, 8am–10pm
Mobile service – we come to you across Portsmouth & the PO postcode area
Ready to solve your car key problem?
We're on the way. Call us now.
