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    Motorhome Guide

    Knaus Sun I Motorhomes for Sale

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    Berths5
    Guide price£85,000–£140,000

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    Layout

    At a glance

    • The Knaus Sun I sleeps 5, suitable for families or couples who want extra space.
    • At 4,500kg GVW, drivers who passed after January 1997 will need a C1 licence.
    • Layout: Island Bed (also available in Fixed Single Beds, Drop-Down Bed (Cab)).
    • Used prices typically range from £85,000 to £140,000.

    Quick verdict for Knaus Sun I

    Quick Verdict

    Exceptional build quality and luxurious finishes throughout
    Excellent insulation and heating for comfortable all-season touring
    Spacious and well-designed living areas ideal for extended trips
    Large garage provides ample storage for outdoor equipment
    Higher price point compared to many other motorhomes
    Larger dimensions can make navigating narrow roads and parking challenging
    Increased weight may require a C1 driving licence in the UK

    Road Legal Vitals
    UK

    C1 Licence Required

    Gross weight: 4,500kg.

    5

    Sleeping Berths

    Seatbelt data not available. Check the exact dealer listing.

    Price & Engine

    Lower endUpper end
    £85,000£140,000

    Guide price range

    £85,000–£140,000

    Typical advertised prices for a Knaus Sun I; year, mileage, condition and specification affect value.

    Cab & Chassis

    Driving specs for the Knaus Sun I

    Dimensions:
    Length 7.60m
    Width 2.34m
    Height 2.90m

    Driving Experience

    The Knaus Sun I offers a comfortable driving experience suitable for both motorway cruising and navigating narrower roads.

    About the Knaus Sun I

    The Knaus Sun I motorhome range represents the pinnacle of luxury and innovation, designed for discerning travellers who demand nothing but the best. As a flagship model from the esteemed German manufacturer Knaus, the Sun I offers an unparalleled touring experience, combining sophisticated design with robust engineering. With its integrated bodywork, this motorhome boasts a sleek, aerodynamic profile that not only looks stunning on the road but also contributes to improved fuel efficiency and a quieter ride. Inside, every detail is meticulously crafted to create a lavish and comfortable living space, perfect for extended adventures across the UK and beyond.

    Step into a world of elegance with the Knaus Sun I. The interior is characterised by high-quality materials, contemporary finishes, and intelligent use of space, ensuring both practicality and aesthetic appeal. From the spacious lounge area, ideal for entertaining or relaxing, to the well-appointed kitchen and luxurious sleeping quarters, the Sun I provides all the comforts of home. Advanced insulation, efficient heating systems, and ample storage solutions make it suitable for all seasons, allowing you to explore diverse landscapes without compromise.

    Whether you're planning a romantic getaway or a family expedition, the Knaus Sun I offers flexible layouts to suit various needs, typically accommodating multiple berths without sacrificing living space. Its powerful chassis provides a smooth and stable drive, while a host of driver-assistance features ensure safety and peace of mind on every journey. This motorhome is not just a vehicle; it's a statement of style and a commitment to unforgettable travel experiences. Discover your next grand adventure with a Knaus Sun I on RoamWorthy.

    Check if you can drive this on your licence with our Motorhome Weight Checker.

    Knaus Sun I Video Reviews

    Watch Knaus Sun I reviews on YouTube

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    Expert reviews and walkthroughs of the Knaus Sun I

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    Floor plan

    Interior Layout & Sleeping Configuration

    Explore the Knaus Sun I floorplan and discover how the space works.

    Knaus Rear Island Bed layout illustration

    Layout features

    Island Bed
    Fixed Single Beds
    Drop-Down Bed (Cab)
    L-Shaped Lounge

    Sleeping capacity

    5berths

    About the layout

    Features a fixed bed plus additional sleeping space for 5 people. The permanent bed avoids nightly conversion.

    Live Knaus Sun I Inventory

    1 exact-match motorhome currently available

    View all listings
    2018 Knaus Sun I
    +42
    Compare
    47

    2018 Knaus Sun I

    Thompson Leisure

    4 Berth
    £77,777

    Weights

    Gross Vehicle Weight4,500 kg
    Unladen Weight3,700 kg
    Payload Capacity800 kg

    Dimensions

    Overall Length7.60 m
    Overall Width2.34 m
    Overall Height2.90 m

    Accommodation

    Sleeping Capacity4-5 berths
    Layout Types
    Island Bed
    Fixed Single Beds
    Drop-Down Bed (Cab)
    L-Shaped Lounge

    How we assess the Knaus Sun I

    • Compiled from dealer feeds and manufacturer data. Specifications, prices, and stock sourced from verified UK dealers and brand records
    • Specs vary by year, trim, and options. Weights, dimensions, berths, and equipment can differ between model years and optional packs
    • Prices based on recent UK listings where available. Price ranges reflect current and recent dealer listings. Actual prices may vary by condition, year, and specification
    • Always confirm before buying. Verify exact specifications, condition, and equipment with the seller or manufacturer
    How we verify data and methodology →

    Practical ownership tips

    Licence requirements

    At 4,500kg GVW, the Knaus Sun I exceeds 3,500kg and requires a C1 licence (or a pre-January 1997 car licence). Confirm the exact GVW with the seller before purchase.

    Payload capacity

    The Knaus Sun I has approximately 800kg of user payload for passengers, water, gas, and personal gear. Check the actual plated weight against the unladen weight for the specific vehicle you are viewing.

    Before you buy

    Request a habitation check for any used unit. Check the base vehicle service history, MOT record, and whether the V5C matches the seller. For conversions, confirm the vehicle is correctly registered with DVLA.

    Frequently Asked Questions

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    Motorhome Licence Checker

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    Understand A-class, coachbuilt, overcab and more

    Rear Island Bed Motorhomes

    Last updated: 03 August 2026Reviewed by RoamWorthy Editorial Team

    Is the Knaus Sun I the right luxury A-Class for you?

    The Knaus Sun I is a premium A-Class motorhome designed for 4 to 5 people, offering a high 800kg payload and a 4500kg MTPLM. Built on a 7.6m chassis, it features luxury layouts such as Island Beds and L-shaped lounges. With prices ranging from 85000 to 140000, it serves as a flagship model for those requiring significant storage and all-season insulation.

    • Integrated A-Class body with a panoramic windscreen for enhanced road visibility.
    • Flexible sleeping arrangements including Island Bed and Fixed Single Bed options.
    • Substantial 800kg payload capacity for heavy equipment and supplies.
    • All-season capability supported by advanced heating and insulation systems.
    • Spacious L-shaped lounge area complemented by swivelling cab seats.

    Worth knowing: The 4500kg MTPLM requires drivers to hold a C1 category licence in the UK. A width of 2.34m and length of 7.6m may present challenges on narrow rural routes.

    Buying a Knaus Sun I: What you need to know

    Who it suits

    • • Long-distance tourers who require a high 800kg payload for extended trips.
    • • Families or groups of up to 5 people seeking a spacious L-shaped lounge and drop-down cab bed.
    • • Winter enthusiasts who benefit from the integrated design and advanced insulation.

    Reasons to consider it

    • • Exceptional build quality from a flagship German manufacturer.
    • • High-capacity storage solutions including a large garage for outdoor equipment.
    • • Superior visibility provided by the integrated A-Class panoramic windscreen.

    What to check

    • • Verify the specific bed configuration as layouts vary between Island and Fixed Single options.
    • • Confirm the exact berth count for your chosen unit, as models range from 4 to 5 berths.
    • • Check the service history of the advanced heating system to ensure all-season readiness.
    • • Inspect the large rear garage for any signs of wear from previous outdoor gear storage.

    Worth knowing: The 4500kg weight exceeds the standard 3500kg car licence limit. The 7.6m length requires careful consideration for standard parking and storage spaces.

    Compare the Knaus Sun I with similar models

    ModelBerthsMaximum weightLengthTypical price
    Knaus Sun I54500 kg7.60 m£85,000 to £140,000
    Hymer B-MC I680 BLACKLINE54430 kg7.39 m£110,000 to £155,000
    Adria Sonic54400 kg7.52 m£75,000 to £135,000

    The Knaus Sun I sits at the higher end of the luxury A-Class market with a price range reaching 140000. While alternatives like the Adria Sonic or Bürstner Lyseo I 727 G offer similar 5 berth capacities at lower starting prices, the Knaus distinguishes itself with a 4500kg MTPLM and a generous 800kg payload. It is longer than the Hymer B-MC I680 at 7.6m, trading a larger footprint for internal volume and storage capacity.

    Worth knowing: Specifications and prices can vary by model year, trim and optional equipment.

    Ownership and maintenance tips for the Sun I

    • Utilise the 800kg payload to carry seasonal gear without compromising safety.
    • Regularly clean the panoramic windscreen to maintain the visibility benefits of the A-Class design.
    • Ensure the C1 licence remains valid for all intended drivers due to the 4500kg weight.

    Common mistakes to avoid

    • • Underestimating the 2.9m height when navigating under low bridges or fuel station canopies.
    • • Exceeding the rear axle limit when fully utilising the large garage space.

    Worth knowing: Always verify the specific MTPLM on the vehicle plate before transit. Payload figures can be affected by the installation of optional premium appliances.

    Alternatives to the Knaus Sun I

    Data and source notes

    • This page uses the maintained RoamWorthy record for the Knaus Sun I.
    • 8 model images are recorded for this page and served from RoamWorthy-hosted media.

    Specifications can differ by production year, trim and optional equipment.

    Dealer listings are used as current marketplace evidence, not as a substitute for the exact vehicle documentation.

    Worth knowing: Confirm weights, dimensions and fitted equipment for the exact vehicle before purchase or towing.

    Sources and review status for the Knaus Sun I

    This page is supported by 1 recorded source group.

    1 recorded source groupReviewed 1 August 2026
    • RoamWorthy maintained model catalogueeditorial database

    Specifications can vary by model year, trim and optional equipment.

    Read how RoamWorthy verifies model information →