Sportx pressures!

[sportx]

I have got to get some new tyres (rear) and can't find out what the correct pressures should be. Not behind fuel flap, not in owners manual and the best MB could come up with was " try something similar", as a result of messing around with pressures the tyres are shot. Any suggestions?

 

[MB TECH WARRINGTON]

I have got to get some new tyres (rear) and can't find out what the correct pressures should be. Not behind fuel flap, not in owners manual and the best MB could come up with was " try something similar", as a result of messing around with pressures the tyres are shot. Any suggestions?

the fufu valve could be faulty