

The D5 Airtronic has now been discontinued and replaced by the Eberspacher L3 D6L — the latest generation in Airtronic heating technology.
Designed with advanced engineering, the L3 D6L delivers compact, quiet, and exceptionally fuel-efficient heating with an impressive 6 kW output. Launched in 2022, this third-generation Airtronic heater introduces major performance upgrades over the older D5 models:
Enhanced Fuel Efficiency – Faster heat-up times with more reliable performance.
Brushless Fan + Stepless Control System – Extends service life to up to 5,000 hours.
Advanced CAN-BUS Control – Fully compatible with the EasyStart Pro controller.
Ultra-Quiet Operation – Equipped with a redesigned, low-noise fuel metering pump.
Increased Heating Capacity – Now delivering 1 kW more than previous models.
High-Altitude Capability – Works at elevations of up to 3,000m when used with the EasyStart Pro.
Eberspacher Airtronic L3 D6L Diesel Heater
Controller of your choice
Fuel metering pump with holder & wiring plug kit
Complete heater wiring loom
Mounting bracket (L3 D6L specific)
90mm intake grill
90mm air outlet
Comprehensive installation manual (downloadable)
Eberspacher 36-month warranty handbook
Direct replacement for older heaters
Marine installations
Vehicle conversions, campervans, off-grid applications, and more
The L3 D6L represents a major leap forward in performance, efficiency, and reliability — making it an excellent choice for both vehicle and marine heating systems.
We can build custom kits tailored to your project.
If you require additional accessories or support, please contact our sales team or browse our Heater Installation Accessories section above.
heater Installation Accessories tab above.
Warranty Terms
Mellor Solutions Ltd trading as Mellor Online is an authorised distributor of heating parts and heater kits for the vehicle and marine markets.
Warranty Coverage:
Additional Services:
Returning a Heater:
Customer Responsibilities:
Exclusions and Important Notes:
Returns Policy
Our returns policy applies to consumer purchases only (not business or trade orders).
Our returns policy does not cover items that fall under manufacturer warranties. If you believe your item is eligible for warranty service or you wish to return an item for a refund, please contact our support team or email us at sales@melloronline.co.uk.
Refunds and Cancellation Rights
You have the right to cancel your order within a 14-day cooling-off period, starting the day after you receive your items. Refund requests can be submitted within 30 days of the invoice date. Refunds will be processed within 14 days of receiving the returned goods.
Notification of Intent to Cancel
To cancel an order or request a refund under the UK Consumer Contracts Regulations 2013, you must inform Mellor Solutions Ltd trading as Mellor Online of your intention by phone, email, WhatsApp, or post within the applicable period. This is 14 days for cancellations and 30 days for refunds.
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition
Upon receiving your request, we will send you a confirmation and authorization to return the goods. Please include your original invoice number with your return. All items must be in a resaleable condition.
Return Shipping
You are responsible for returning goods using an insured and trackable shipping method at your expense. We will only consider refund requests if there is proof of delivery to Mellor Solutions Ltd trading as Mellor Online from your chosen courier. Once we receive the goods, we will issue a full refund minus any delivery charges.
If you cannot arrange a return, please contact us. We can arrange collection for you, but a fee will apply, which will be deducted from your refund.
Please note that delivery charges from the original purchase are non-refundable, as the service is completed once the order is placed.
Processed and Dispatched Orders
Orders that have already been processed or dispatched cannot be canceled; however, they can be returned for a refund once received by the customer.
We strive to facilitate a prompt refund process upon receiving returned items.
Return Address
FAO: RETURNS
Mellor Online
139 Manor Road
Ossett
West Yorkshire
WF5 0LQ
United Kingdom
Specific Terms
Your Statutory Rights
Your statutory rights are unaffected by the above terms. Consumers, excluding business trade customers, are further protected under the UK Consumer Contracts Regulations 2013.
For any questions, please contact our support department before returning any items.
Shipping Information: UK & Worldwide
UK Delivery:
International Delivery:
D5 Airtronic
| Technical Description PDF |
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