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Mega Motorhome Repair Centre Surrey

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Walton-on-Thames
Mega Motorhome Repair Centre Surrey

Motorhome and Campervan Servicing, Repairs & Maintenance by Mega Motor Repairs Group .

08/03/2026

𝗔𝗱𝗿𝗶𝗮 𝗧𝘄𝗶𝗻 – 𝘀𝗲𝗿𝗶𝗼𝘂𝘀 𝘀𝘂𝘀𝗽𝗲𝗻𝘀𝗶𝗼𝗻 𝘂𝗽𝗴𝗿𝗮𝗱𝗲

Crosswinds and motorway stability are common complaints with panel van conversions like this Adria Twin, so the owner decided to upgrade the suspension properly.

Upgrades like this are becoming increasingly popular with motorhome owners looking to improve stability and overall driving comfort.

We had this fantastic van in the workshop for a serious suspension upgrade.

Suspension upgrades like this are one of the most noticeable improvements you can make to the way a motorhome drives.

The owner wanted the van to feel more planted on the road — especially on motorways — and less affected by crosswinds.

We started the work by replacing the rear bump stops with a supplementary airbag system. This type of airbag setup supports the rear suspension and significantly improves stability when the van is loaded.

If you’ve never driven a motorhome with rear support airbags before, it’s difficult to imagine the difference they make.

There are several versions of these systems available — from simple single-valve setups all the way to fully independent airbag systems with compressor and reservoir tank.

This installation was top-tier, featuring independently adjustable airbags with an onboard compressor and control panel.
(The only component not fitted was the reservoir tank, which isn’t essential but helps speed up pressure adjustments.)

Once the airbags were installed and plumbed in, we fitted and wired the compressor and control system.

To complete the upgrade the suspension was further improved with:

• Bilstein B6 shock absorbers (front and rear)
• Heavy-duty front springs

This combination dramatically improves body control, stability and overall driving confidence.

𝗗𝗶𝗱 𝘆𝗼𝘂 𝗸𝗻𝗼𝘄?

When rear airbags are independently adjustable and paired with a compressor, they can also be used to help level the motorhome when parked.

Within their limits they allow quick and easy adjustment for:

• Front-to-back (pitch)
• Side-to-side (roll)

It’s a very useful feature — not only improving the driving experience but also making life easier when setting up on uneven pitches.

Have you ever upgraded the suspension on your motorhome or campervan?
What difference did it make to the way it drives?

23/02/2026

A-Class Itineo – Front Window Damp Repair

This Itineo A-Class returned to us following last year’s habitation inspection, where high moisture readings were detected around the front side cab window frames.

The readings were significant enough to confirm remedial work was required, so after discussing the options with the owner we proceeded with the correct repair — not a temporary fix.

Both side cab windows were removed completely.
The timber frame was allowed to dry properly.
All old sealant was removed and mating surfaces were cleaned back to solid material before resealing and refitting the frames.

As the photos show, this was caught just in time.

The timber had already started to deteriorate, but structural integrity was still intact. Another season of water ingress would very likely have meant structural timber replacement and exterior paintwork reconstruction.

Older A-Class motorhomes are not everyone’s favourite jobs.
Access is tight, construction methods are different, parts can be scarce or discontinued, and the way they are built makes them more complex to strip and rebuild properly.

But if you understand how they’re constructed — and take the time to do it correctly — they are absolutely repairable.

This is exactly why proper habitation checks matter.
Damp does not fix itself — and early intervention makes all the difference.

One more motorhome saved.
Dry, sealed and ready for the next adventure in Surrey.

19/02/2026

🔧 Major Overcab Reconstruction – Factory Spec Restoration

We had this rental motorhome in after it was guided off a ferry in the wrong lane and struck a height barrier.

The impact caused severe damage to the entire overcab roof section and upper side wall structure.

After a full structural assessment, we made the decision not to patch-repair the roof skin.
Instead, we ordered a complete new overcab roof section directly from Adria.

As an independent Adria warranty centre, we have direct access to genuine factory parts – which allows us to restore vehicles properly rather than cosmetically hiding damage.

The repair involved:

• Removing the damaged overcab roof section
• Rebuilding the upper side wall framework
• Refitting and bonding a brand-new factory roof panel
• Re-sealing and finishing to original specification

The motorhome is now structurally sound and restored to factory standard.

28/01/2026

Overheating Truma boiler – frost damage case

We had an Auto-Trail in for various repairs, one of which was an intermittent Truma boiler overheat (hot water warning) when running on gas.

With a winter trip to Europe planned, the customer understandably needed reassurance that the boiler wouldn’t fail halfway through the trip.

Intermittent faults can be tricky — during testing the boiler was often running normally. However, for an experienced technician, an overheating Truma boiler immediately raises suspicions of frost damage.

That suspicion increased when we noticed the boiler was fitted with a manual frost protection valve.

On strip-down, the issue became clear.
The water chamber had expanded due to freezing and was pushed hard against the heat exchanger. There must be a defined air gap between these components — without it, excessive heat transfers directly into the water chamber, causing overheating. This is dangerous both for occupants and for the vehicle’s water system.

Unfortunately, the expanded tank had also forced itself against one of the heating elements. Truma heating elements must be clamped evenly and to a very specific torque across the core. Once that relationship is disturbed, premature element failure is inevitable.
This is why we never replace heating elements individually on Truma boilers.

With both the water tank and heater core compromised, a rebuild was no longer economical. We discussed the options with the customer, who decided that replacement was the correct long-term solution.

Once the new boiler arrived, we:
• Installed and commissioned the unit
• Replaced the manual frost valve with a Truma automatic frost protection valve, significantly reducing the risk of future freeze damage

We then completed the remaining repairs (separate post coming) and the vehicle is now ready for winter adventures with confidence ✅

19/12/2025

VW Transporter T6 in with engine management light on and stuck in limp mode 🚐⚠️

A quick diagnostic pointed to a fuel temperature sensor fault.
From experience with these vans in fleet maintenance, we knew it was unlikely the sensor itself — much more likely a wiring issue.

And sure enough, on inspection we found the loom rubbing on the cam cover, which had worn through the insulation and caused the fault.

While there, we also spotted rubber hoses chafing against each other, so we corrected that too — likely preventing a future breakdown.

🔧 Loom repaired & protected
🛠️ Routing corrected
🚐 Fault cleared — van back to full health

Another hidden issue caught before it became a bigger problem 👍🏼

10/12/2025

Update on the T6.1 from earlier — now fully repaired ✅

This van originally came in with both electrical and gas system faults. The final part we were waiting on was a new gas filler hose from the distributor, which arrived a few days ago.

We’ve now:
• ✅ Replaced the gas filler hose
• ✅ Installed a new gas regulator
• ✅ Fully tested the complete gas system

What genuinely shocked us was the condition of the original compression joint on the old hose — especially considering this conversion is less than 4 years old. Severe corrosion at a critical joint like this is not something you ever want to see on a gas system.

Another perfect example of why proper inspections and professional repairs matter — safety first, always. 👍

05/12/2025

Swift Kon-Tiki in for a roof repair after meeting a low tree branch 🌳🥶

The impact caused a deep crack in the GRP roof panel.
The owners temporarily covered it with a sticker — a smart move to slow down water ingress — but a proper structural repair was definitely needed.

Our body technician:

🔧 Repaired the cracked GRP section
🛠️ Reinforced and reshaped the damaged area
🎨 Prepped and colour-matched the panel
🚐 Resprayed the full repair zone for a seamless finish

The roof is now fully watertight, structurally sound, and looks like new again

02/12/2025

⚡ Flexi Solar Nightmare – Nissan Elgrand fixed.

This Nissan Elgrand camper came in for a failed solar panel. No surprise here: like most pop-tops, it had a flexi solar panel bonded to the roof… and, as usual, it failed after a few years.

👉 In our experience, flexi solar panels rarely last longer than 4 years — especially on raised roofs where heat buildup is extreme.

After checking the system (the MPPT solar controller on board could comfortably handle more power), we upgraded the setup to a 200W panel for better performance .

Removing the old panel was the painful part — cutting off bonded flexi panels needs patience, otherwise you will damage the pop-top roof.

And there was another consequence:
Because the fault wasn’t spotted immediately, the leisure battery had been deeply discharged and suffered permanent damage. A perfect example of why a habitation check can save you money.

We installed a replacement battery the next day, tested the system end-to-end, and the Elgrand is now ready for more adventures. 🚐🔧

Address

Apps Court
Walton-on-Thames
KT122EG

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm
Saturday	10am - 1pm

Website

https://megamotorrepairs.co.uk/

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