Throughout the Middle East earnings from your Motor Trade Job are free of any local income tax and barring a few exceptions will be free of UK income tax to British Citizens.
Salaries are paid in the local currencies and in each case these local currencies are linked to the US Dollar. Therefore to British Nationals the Dollar Stirling exchange rate is critical for remittances back in the UK.
Benefits normally include one return air fare each year for the employee and his/her family where appropriate, local health care, and in the Motor Trade a company car.
Accommodation is either provided quite separately or an allowance is given as part of the salary. A similar allowance for utility bills and the shipping of personal items from the UK is normal practice. No pensions are paid but in most countries are gratuity linked to length of service is paid at the contracts end.
Automotive Job contracts in the Middle East are most often for 2 years duration but renewable on a rolling basis.