Hi

One minor snag with my Roomster is that I find having only 2 levels of adjustment for heated seats insufficient. By comparison, I have 5 heat levels in Mk1 Superb.

I have now found a solution to this, if you also find heated seats too hot on "Low" setting, consider fitting a 12V/ 10V switching regulator (DC-DC converter, 10A+, Ebay has cheap ones) in line after the heated seats fuse. I did just that, plus I put a bypass relay and a switch so the seats can still be used at stock power settings if needed, or at reduced settings. Works great.

For anyone doing the mod, the seats take about 2.1A each on "low" setting, and about 6.4A on "high" setting, so about 26W / 80W.

I find 26W too much for continuous use on a long trip. With 10V output , each seat takes about 1.7A on "low" and about 5.1A on "high" setting, so about 17W / 51W. Effectively, this mod gave me 4 heat settings instead of 2.

Note that setting voltage lower than 10V will result in position "2" lamps remaining unlit even when on, as there is too low voltage (and a large voltage drop when high current is drawn), though the seats will still work fine (at lower power). Position "1" lamps work fine even at 9V / 13W output per seat, as the voltage drop on cables to the switch is much lower.

Hope it helps a fellow Roomster owner, as prior to doing that mod I felt buying the "too hot" heated seats was a bit of a waste outside heavy winter time.

Thanks for the info, I`ve just ordered heated seats for my new Roomster, but as it will be under warranty for 3 years, very unadvisable to `tinker` within that time I think...have used Ford S max in the past with the adjustable heat settings and they are very good, but at £70 a seat on this offer(vat free), you get what you pay for...Thanks anyway